Am I wrong for assuming my fiancee and I are exclusive?

A man’s world shattered when a friend’s photo revealed his fiancée kissing another man at a nightclub, unraveling a six-year relationship and their recent engagement. Her defense—that they never “officially” agreed to be exclusive—left him stunned, prompting a swift exit and a flood of questions about love, trust, and unspoken vows.

This isn’t just about a kiss; it’s a story of betrayal cloaked in technicalities. The narrative pulls us into a heart-wrenching confrontation, raising questions about the assumptions that bind relationships.

‘Am I wrong for assuming my fiancee and I are exclusive?’

'Angie'(24f) and I(24m) have been dating for six years now and living together for one year. She proposed to me last month. Yesterday, my friend saw her at a nightclub kissing another guy. He sent me a picture and I confronted her over it.

She admitted that she's still sleeping with other guys and told me that while she and I love each other we never had an 'official discussion about being exclusive' and haven't gotten married yet so 'technically it's not cheating.' Like wtf? We're literally engaged! That just struck me as so crazy.

I just don't know what to think, say or do right now. I moved out of her apartment, leaving all the stuff she's given me over there. Only took stuff I got myself. Angie's been messaging me non-stop.. UPDATE : Texted her that it's over now and blocked her.

A fiancée’s claim that engagement doesn’t imply exclusivity unless “officially discussed” is a flimsy excuse for infidelity, undermining the trust at the core of a six-year relationship. The man’s assumption of monogamy was reasonable: cultural norms in most societies default to exclusivity in long-term relationships, especially post-engagement.

Her actions—kissing and sleeping with others while justifying it with a lack of explicit agreement—constitute cheating and gaslighting, as she shifts blame to him for not clarifying boundaries. His decision to leave was a healthy assertion of self-respect.

Infidelity often ends relationships: a 2021 Journal of Social and Personal Relationships study found 70% of couples dissolve after cheating, with trust rarely regained. Relationship therapist Dr. Esther Perel notes, “Betrayal thrives in secrecy and ambiguity; healing requires accountability, not excuses” (source).

He should prioritize healing through therapy, get tested for STIs as Reddit suggested, and maintain no contact to rebuild his confidence. Her non-stop messaging shows denial, not remorse. He’s not wrong—his trust was betrayed, not misplaced.

See what others had to share with OP:

Reddit unanimously supported the man, declaring him NTA for assuming exclusivity, labeling his fiancée’s actions as blatant cheating and her “no official discussion” excuse as absurd and manipulative. They praised his swift exit, urging him to block her completely and get tested for STIs, with some humorously calling her logic “for the streets.”

Many emphasized that monogamy is the default in engaged relationships, and her gaslighting—blaming him for unclear boundaries—was a red flag. The consensus encouraged him to move on, heal, and avoid reconciling with someone who disrespects their commitment.

babyshark75 − go get yourself tested

barugosamaa − we never had an 'official discussion about being exclusive' and haven't gotten married yet so 'technically it's not cheating. It's literally cheating. 6 Years , engaged and

MrAkaziel − Oh please, you absolutely know you're not in the wrong here. However you slice it, monogamy is still the default relationship dynamic in our society. It's the implicit norm unless stated otherwise.

Hell, even under most ethical non-monogamy paradigms it would still be considered cheating because you're supposed to err to the side of caution: when in doubt about a boundary, you ask your partner first before risking to infringe upon their comfort zone.

Actual open relationships require incredible amount of communication and thoughtfulness, not trying to have your cake and eat it too at the expense of your loved ones by searching for loopholes in the relationship rulebook.. She's a cheater and is trying to dodge any morale consequence through the most bogus and bad faith technicality.

RevolutionaryUsual72 − I just know people she tells are gonna look at her like she’s insane lol. Unless she’s been somehow selling them another narrative. “Yeah it’s over, we were together 6 years and engaged but he never said it was exclusive sooo://“ like HUH?? Hope you can heal from this dude 😭

mezcalligraphy − Not wrong. Engagement means exclusive. She is a cheater. She seems to want more than what you are offering. At least you found out before you married her.

metsgirl289 − So my fiancé and I never officially had “the talk”. He just started calling me his gf one day and I wanted to be his gf so I went with it. If either of us did anything physical with another person (or had an emotional affair) it would 100 percent be cheating. She’s cheating and gaslighting you.

Shinobiqwerty − Angie is for the streets. 😂

NCNative919 − Good for you. I dated a woman many years ago and I one day found out she was engaged to someone else. She had told me she was single. When I found out I ended it and she didn’t understand why. She told me she wasn’t married yet (similar to your situation).

I can’t for the life of me understand why someone who is engaged still thinks it’s ok to date around. Had I known who the guy was I would have told him. At least I found out after 5 or 6 dates not a year into dating her.

Sevs12 − Never go back.

broadsharp2 − Not wrong. Get her completely out of your life. As though you never met her. Run.

Readers, trust shapes love—what’s one boundary you’d never compromise in a relationship? This wasn’t just about a nightclub kiss—it was about a fiancée’s betrayal shattering a six-year bond with a callous technicality.

The man’s choice to walk away, leaving her messages and gifts behind, reflects strength in reclaiming his worth. As he heals, it’s a reminder that love demands honesty, not loopholes. How do you rebuild after a betrayal? Share your story—what’s your key to moving forward?

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