Forgiving others but still obsessing

I’ve just recently found out that Relationship OCD is a thing. I feel like I relate but it also feels like relationship trauma. I’m in a fairly new relationship and I keep telling myself that things are going great, we are good, he cares for me, but does he? There’s this unbelievable amount of self doubt that sits in me because of what my ex did to me many months ago. I kept getting told that I do too much, i smother, need constant reassurance, then got told that I don’t care enough, the things I do aren’t enough and that I’m not enough. I feel like I am waiting for the day that I get broken up with because of these “problems” just so I can be proven right at the fact that I should be considered unlovable. I go through this every month around my period because I get so emotional and nervous that I stress over the idea that he doesn’t like me. How does someone continue a relationship with Relationship OCD? How do I explain it?

So, I know my capacity to get fixated on things. And it's normally something that's relatively remote but, my latest issue is really getting to me and I was wondering if people have any advice. I'm avoiding getting too into specifics, as I don't want this to get reassurance-y but, in essence.. I came to the realisation recently that people who I'd been "friends" (feels like the wrong term now) when I was younger were not very nice people, and normalized a lot of very unpleasant behaviour towards other members of the group. They really normalized it, sold themselves as figures of authority, as older and more responsible and grown-up than others, and looking back, they acted horribly. And coming to this realisation, that I'd been manipulated into just accepting their behaviour has just... broken me. My OCD has latched onto it and I can't stop feeling irreversibly tainted by it. I've talked to others about it, and they've reassured me, told me it's not a big deal and that I hold myself to too high a standard, but none of that sticks. I feel better for a bit, then think 'Maybe when you told them you were skewing it to make yourself look better' or 'Did you leave out a crucial detail'. I keep ruminating over and over, trying to remember exactly how everything played out, trying to figure out if I fed into the behaviour, if I did something bad myself (because y'know, I feel like I was accepting of it at the time, so what does it say about my own values?). I know I need to stop doing all this if I want to improve, but then some part of me keeps saying 'So, you're just going to let yourself off the hook then?' Normally, I can rationalize my own fears to some degree, assure myself something won't happen, but the realness of the situation, and the fact I only came to understand the reality of it because the thought had been bothering me means it feels so much more all-encompassing. I know confessing in itself is a compulsion, but I keep feeling that if I'm not I'm somehow concealing what I 'really am' from others around me, and any positive interactions are me deceiving them in some way. I feel like I can't enjoy anything in life right now, and a good part of me feels I should not enjoy it ever again. If anybody has any advice on it, I'm all ears. Or even hearing if you relate to these feelings, I might appreciate the solidarity at least.

Does Rocd make it nearly impossible to forgive your partner for anything. Whether it is big or small? My situation is so gray area where there’s something my bf did that I feel like I’m not okay with but he did this when we were first dating (not bf and gf yet). I ruminate all day about it bc I don’t want to lose him and see a future with him and I know he loves me so purely. But I also feel like I’m going against my morals here bc I do feel betrayed by what he did. I try to forgive him by diminishing my feelings and telling myself “he never did anything physical with a girl or went out with another girl while we were together” but still feel so hurt that he even messaged another girl while us dating. He’s given me an explanation and has proved how much I can trust him so I’m just completely stuck on whether I should forgive something I know I would’ve never done to him or leave him even though the only thing he’s done wrong was before us becoming official. I’ve broken up with him countless times over this situation bc I feel like I “can’t live with it” but then immediately when we break up I want him back and I kind of understand his explanation and reasoning. I don’t know what is ocd and what is my real intuition anymore. I genuinely think it’s both. Are any of you guys in the same boat?