The friends with benefits arrangement has become a common relationship structure. Two people who enjoy each other’s company decide to add a sexual component without the expectations of a committed partnership. In theory, it offers the best of both worlds: physical intimacy without emotional risk. In practice, it is rarely that clean.
A longitudinal study that followed 191 people in FWB relationships over two years found that the majority were not satisfied with the outcome. Not because casual relationships are inherently wrong, but because human attachment does not cooperate neatly with the boundaries these arrangements try to set. The research showed that participants spent more time managing emotional confusion, jealousy, and uncertainty about the relationship’s status than they spent enjoying the benefits they initially signed up for.
This does not mean FWB relationships are always a mistake. But it does mean they deserve more honest examination than they usually get.
Why These Relationships Get Complicated
The central difficulty of a friends with benefits relationship is biological. Physical intimacy triggers the release of oxytocin and dopamine, neurochemicals that promote bonding and attachment. Your brain does not distinguish between sex that is “casual” and sex that is “committed.” The chemical response is the same. Over time, one or both people almost inevitably begin developing feelings that were not part of the original agreement.
This is not a weakness or a failure to follow the rules. It is how the human brain is wired. Attachment is not something you can opt out of by deciding in advance that you will not get attached. It happens below the level of conscious choice, which is why so many FWB arrangements that start with clear mutual agreements end with blurred boundaries, silent renegotiations, and at least one person managing feelings they did not plan on having.
The study confirmed this pattern. Boundaries that were explicit at the start of the relationship became increasingly ambiguous over time. Participants described ongoing cycles of jealousy, anxiety about whether the other person was seeing someone else, and confusion about what the relationship actually was. The emotional labor required to maintain the “casual” framework often exceeded the emotional labor of a committed relationship, which is the opposite of what most people expect going in.
Five Questions Worth Asking Before You Start
If you are considering a friends with benefits relationship, or already in one, these questions are worth sitting with honestly.
Are you prepared for the emotional complexity?
The arrangement may start simple, but consistent physical intimacy tends to produce emotional attachment regardless of what both people agreed to. If one person develops feelings and the other does not, the resulting dynamic can be genuinely painful. The question is not whether emotions will enter the picture. It is whether you are prepared to handle them when they do.
Is one of you secretly hoping this becomes something more?
Research shows that a significant percentage of people in FWB relationships are privately hoping the arrangement will evolve into a committed partnership, even though they understand that contradicts the premise. If that is true for you, it is worth acknowledging, because FWB relationships rarely transition into committed ones. Investing time and emotional energy in the hope that it will is likely to end in disappointment.
Can you afford to lose the friendship?
The “friends” part of friends with benefits is supposed to be the foundation. But adding sex to a friendship changes the chemistry of the relationship in ways that are difficult to reverse. If the FWB dynamic ends badly, through jealousy, unreciprocated feelings, or simple awkwardness, the friendship itself may not survive. Before starting, it is worth asking whether the friendship matters enough to you that risking it is not worth the trade.
Is this preventing you from pursuing what you actually want?
A FWB relationship can function as a comfortable substitute for the work of finding a committed partner. It provides enough intimacy to take the edge off loneliness without requiring the vulnerability that a real relationship demands. That can feel like a win in the short term. In the longer term, it can mean months or years spent in an arrangement that is “fine” while the kind of connection you actually want remains unpursued.
Do you have the emotional bandwidth to manage it?
FWB relationships require more emotional management than most people anticipate. Monitoring your own feelings to make sure you are not getting too attached. Navigating jealousy when the other person dates someone else. Renegotiating the terms when one person’s needs change. That emotional energy has to come from somewhere, and it is worth asking whether it could be better invested in a relationship that has the potential to give back more than it takes.
What the Research Found
The study, titled “A Longitudinal Examination of Friends with Benefits Relationships,” tracked participants over two years. The questionnaire and results are publicly available.
The key findings were consistent with what therapists see in clinical practice. Emotional stress and confusion increased over time rather than remaining stable. Boundaries that were clear at the outset became blurred as the relationship progressed. Jealousy and uncertainty about the relationship’s status were pervasive. A significant portion of the time spent in the relationship was devoted to managing these emotional complexities rather than enjoying the arrangement. And the popular belief that FWB relationships serve as stepping stones to committed partnerships was not supported by the data. The transition from casual to committed was rare.
None of this means that every FWB relationship is destined to fail, or that people who choose them are making a bad decision. What it means is that these arrangements carry emotional costs that are consistently underestimated, and that the “no strings attached” framing does not reflect the reality of how most people actually experience them.
What Committed Relationships Offer That FWB Arrangements Typically Do Not
This is not about ranking one type of relationship as superior to another. Different structures serve different needs at different points in life. But if you are weighing your options, it is useful to understand what research consistently shows about the psychological benefits of committed partnerships.
Committed relationships tend to provide deeper emotional intimacy, the kind that comes from genuinely knowing another person and being known by them. They offer stability and security: the sense that someone will be there for you not just when it is convenient but when things are hard. They facilitate personal growth, because a partner who is invested in your life will challenge you, support you, and hold you accountable in ways that a casual arrangement does not. They include shared experiences that build a history and deepen the bond over time. And they provide the social recognition and community support that comes with a relationship that is acknowledged and valued by the people around you.
None of these benefits are guaranteed in a committed relationship, and their absence does not make a FWB arrangement wrong. But if you find yourself in a FWB relationship and feeling persistently unsatisfied, it may be because the arrangement is unable to provide what you actually need.
When to Talk to a Therapist
If you are struggling with the emotional fallout of a FWB relationship, whether it is confusion about what you want, difficulty setting or maintaining boundaries, a pattern of choosing casual arrangements over committed ones, or anxiety about vulnerability and intimacy, therapy can help you understand what is driving the pattern and what you actually want from your relational life.
Sometimes the pull toward FWB relationships is connected to deeper attachment patterns that formed in childhood. A fear of abandonment that makes commitment feel dangerous. An avoidant attachment style that equates closeness with loss of independence. A belief, formed early, that you are not worthy of the kind of love that asks for the whole person. These patterns are not fixed. They are learnable, and they are changeable with the right support.
Relationship Therapy in Lakewood and Longmont, Colorado
At Self Care Impact Counseling, we work with individuals and couples navigating all kinds of relationship dynamics, from casual arrangements that have become emotionally complicated to committed partnerships that need repair. Our therapists in Lakewood and Longmont are trained in attachment-based couples therapy, EMDR, and other evidence-based approaches. We offer both in-person and online sessions for anyone in Colorado.
We invite you to call us at 720-551-4553 for a free 20-minute phone consultation, or try our Find-Your-Therapist tool to get matched with a therapist who fits your needs. You can also reach us through the contact page on our website.
Self Care Impact Counseling envisions a new age of counseling for adolescents, adults, couples and groups that makes a REAL difference with core values of GROWTH | BALANCE | COMPASSION | INNER HARMONY.
About the Author
Alayna Baillod, LCSW, is a Clinical Supervisor and the Owner of Self Care Impact Counseling. She is an EMDRIA Approved EMDR Consultant and EMDR Therapist, extensively trained in Gottman Couples Therapy, Emotion-Focused Therapy (EFT), DBT, Somatic Therapy, Internal Family Systems (IFS), and Attachment Theory. Alayna specializes in couples counseling, EMDR trauma therapy, and codependency recovery. Find your therapist here.
