Relationship OCD, obsessed with girlfriend’s past

I have been battling ocd for over a year now and it likes to switch themes. Currently, it’s attacking my relationship with my girlfriend who I’ve been with since I was in high school over 10 years ago. It first began as an intense feeling that I have to leave or break up with her over dumb little things. Then it changed into a lot of guilt for having any thought about another girl. And the worse is feeling this intense guilt for past things I’ve done in the past while in this relationship. We were so young and I was teenager, but I often found myself watching porn, fantasizing about real other people in my life, and getting off to other girls that I may have known. When I was younger I didn’t think it was bad and that it was just a normal teen boy thing, but 10 years later I have so much guilt about it. And yes I’m with the same girl now. We’ve had our ups and downs, but I know I love this girl and I’m ready to propose to her soon. Anyway, these past mistakes I did when I was younger make me feel like a cheater and I can’t stop ruminating about it. I feel like I have to admit every detail and person I’ve ever had a bad thought about. I feel like if I propose to her and don’t tell her everything, that I’m a lair and didn’t give her the full picture. And the other day one of the girls I thought was hot when I was younger, came up in convo and I just went downhill. Now she knows I deal with OCD and she is very supportive, I’ve told her before that I did some bad things, but never all the details. And that’s all my brain keeps telling me to do. I have so much tightness in my chest and just want to be able to breathe again. But everyone says to not admit or it’ll reinforce the cycle, I’m just not sure how everyone else does that. And at the same time, maybe I am a cheater and just simply a bad person. Idk! I never cheated physically or anything like that, but my past mistakes feel like I did. But again I may just be a bad person! Please if anyone has advice or is dealing with similar things, I’d appreciate the help!

I’m gonna try to make this make sense, and any support or advice would be great. I have a beautiful girlfriend, who I’ve been dating off and on for a year. We were really rocky but got our shit figured out 4 months ago and have been strong since. I truly love this girl more than I’ve loved anyone. And I know based off the sheer amount of ocd that has come up on our relationship, that she means a lot to me. Me and her were in a friend group in 2022 and we never liked each other. However she had a sexual relationship with one of my old friends. Fast forward to now I haven’t talked to him in a long time and I don’t see it as an issue. However… I keep having this vivid flashback to him touching her some kinda way in 2022. I can’t remember exactly what happened or the details but it’s running through my head. I guess this is retroactive jealousy but it’s really almost hurting my feelings. I wish it would stop but I know ocd doesn’t work that way. I just wanna be happy with my girl and not upset at her past experiences

Hey, I really need your opinion – I think I might be struggling with Relationship OCD, and these thoughts are driving me crazy. I’ve been officially diagnosed with OCD, and I believe I also have ROCD. My obsessive thoughts often focus on one specific girl from my boyfriend’s past. She had messaged him a few times, and I think she liked him – but he never liked her back. He barely knew her, never found her attractive, and never wanted anything with her. She’s just a good friend of his best friend – not an ex or anything like that. He told me that he happened to be in the same group as her a couple of times – once at a birthday party and once at a fair – just because his best friend brought her along. He made it clear several times that she’s not his type at all, neither in looks nor in personality. He described her as someone who likes to go out and party a lot, and said that’s just not what he’s into. He also said he didn’t ask about her – these things were mentioned to him before our relationship. Almost all of this happened before we met – except for one thing: the fair. That was just one day before our second date, back when we had just started getting to know each other. She was with his friend group that night. He said he only said hi and bye to her, nothing more. The next day, when we met again, we were talking about his friends’ heights. He casually mentioned that his friend was the same height as that girl – 1.70 m. Ever since, I keep wondering: If she meant nothing to him, why did he even talk about her? Or did he actually talk to her that night, even though he said he didn’t? I know he said they barely exchanged a word, but somehow he still knew that detail. I just find that strange. Another example: He once said she was “kind of slutty.” Then, one or two months later, when I brought it up again, he said he didn’t know if she was or not, and that he didn’t care at all. That really confused me. I keep wondering: Why did he say something like that in the first place if he supposedly doesn’t care about her? I also notice this really frustrating cycle: When I talk to him about something that doesn’t make sense to me, I feel brief relief. But then, almost immediately, another thought or detail pops up that feels “off” again – and I feel like I have to bring that up, too. I can’t tolerate the uncertainty. It’s like an endless loop. These little “inconsistencies” – or what I perceive as inconsistencies – make me spiral, even though I do believe he’s being honest with me. I want to trust him. But I have this constant urge to bring up every little thing that doesn’t feel logically right. Every detail stays in my head for days, and it’s really hard not to talk about it. Does this sound like Relationship OCD to you? Do any of you go through this constant analyzing and doubt? I’d really appreciate your thoughts. I’m slowly ruining my own relationship..