Real event - cheating?

I have this deep fear I’ll accidentally cheat on my long term partner. This fear was initially triggered a couple years ago after being at a bar with my friends where I enjoyed the attention of being flirted with by a stranger. Because of my enjoyment of receiving verbal attention, I began spiraling about what if I accidentally cheat. Since then I have made multiple confessions to my partner to seek reassurance, replayed events over and over in my head, spent hours googling/looking at reddit threads, and now I dread “bar like” situations where I know my partner won’t be around. Today I was triggered and have wasted about 4-5 hours of my day ruminating. Does anyone else with relationship ocd struggle with this fear and have any tips?

So I’m 22 and have had ocd my entire life. I’m about to hit 1 year in my relationship. I’m extremely happy and haven’t really had any rocd problems. Which is great. So here’s the problem. About 4-5 months into my new relationship I was bored one night and couldn’t sleep. I must’ve doom scrolled TikTok and Reddit for hours that night. Until finally I randomly thought about going on an anonymous chat site. I use to do this all the time back during covid when I was stuck in the house So for what ever reason I made a fake girl name and instantly connected to some random dude. I thought it was funny and decided to troll alittle cause why not I guess I just wanted to pass the time. He asked me where i worked and I said a bar (obv I don’t ) and he said “wow u must get hit on a lot u must be hot” and said yeah i do and then I felt really weird about it. So I closed the site down. Fast forward to now I felt like I cheated on my gf by flirting with another guy. Even tho I don’t like guys. It was months ago so I can’t rmeebr exactly how the text went but it was along those words and the convo had to been less then 3 minutes. Now since then all I can think is maybe I wanted the texts to go further. Or what if I said something sexual? What if I liked it sexually? On top of that, it was just a really weird one off thing I did. I mean I have no idea why I pretended to be a hot girl working at a bar lol. I guess I was just trolling or curious idk. Either way it would be really hard to explain to my gf and I don’t really want to tell her. Butttt , since I feel like I cheated I feel awful like I’m horrible person. These last 4 days I keep reading reddit post about ppl cheating on chat rooms and I keep googling to see if I should tell my gf or not. I understand sitting with uncertainty but I need to know desperately if I did something wrong bc my gf deserves to know. But like I said if I told her what happened it such a weird situation that she may think something serious happened. Also I dealt with a porn addiction at the time and I’ve gotten a lot better. So far I’ve been 3 days clean of watching porn and don’t even have the need too. How ever I think the real reason why I feel like I cheated was my intentions altho I went on just joking around I feel like I was on there for something sexual. Which I’m glad I never shared any personal things , pictures or anything graphic and the convo was less then 3 minutes long based off a fake character

I’m so so so anxious right now, I got triggered really badly. My partner made a joke saying he’s glad all his coworkers are old and married because he “won’t develop feelings for any of them.” This sent me into a major spiral and I almost threw up and starting sobbing from the anxiety. It triggered me badly and everything was fine before that. I’m so anxious that I cheated on my partner. I’ve had an ROCD obsession with another person for a few months now, and I’ve told my partner EVERYTHING. I told him how I have a crush on this person, how guilty I feel about messaging a group server that this person is a part of (despite being very careful to never ever message them privately or even reply to their messages in the group server and instead message other people), how I have fantasized and daydreamed about this person. My partner was fine with it, and he said fantasizing is normal and that he has had crushes too. He said he has had a work crush and fantasized about her and that it was all fine and that fantasizing is fun as long as it stays a fantasy. I kept telling him that I am terrified that I’m having some sort of one-sided emotional affair by fantasizing about this person, and my partner kept telling me, “Okay so what? Now what? Let’s say your worst fears are true, now what? I’m not leaving you and you’re not leaving me so why worry about it?” I also feel like fantasizing about this person turned into a compulsion because I would spend months agonizing over the ROCD guilt, ruminating, throwing up, thinking, and then I’d try to fantasize in order to soothe the anxiety and “prove to myself” that it was nothing. I have talked to my therapist about this extensively and he told me that I should not confess as it’s a compulsion. He said if it were something wrong, my body would just “know” and I’d intuitively confess instead of ruminating over and over on whether it’s worth confessing or not. My partner told me he doesn’t want any more confessions and that he doesn’t need to know what goes on in my head. I’ve told him a lot already, about the crush, my fears, the daydreaming, and he said it was all fine. I know for a fact that I have never ever ever crossed a line with this person, I have been extremely careful to rarely ever interact with him. I’ve been careful to ensure that we’re not even FRIENDS at all, just barely acquaintances. Literally every single interaction has been just small talk the handful of times that I’ve seen him show up to a group event. He is also moving away and I’m never gonna see him again. I have been extremely obsessive and careful about not ever EVER speaking to him unless spoken to, never giving him attention, obsessively monitoring the frequency with which i pay attention, etc. But I’m so terrified that I’ve already done something wrong by having these thoughts and feelings. I feel like the feelings lasted this long BECAUSE of the OCD and guilt and anxiety. Because I became anxious and started ruminating on the feelings and the morality for months and months. I don’t know what to do. I need help. I feel like I’ve irreparably ruined my relationship. Did i catch feelings? Is there a difference between feelings and a crush? Is this a form of cheating? We are going on a trip in literally 12 hours and I’m so incredibly stressed I can’t take this. Do i confess?