My ocd convinces me that I’m a bad person because my ex best friend left me due to us fighting because of my ocd :( have any advice?

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.

So i had really bad pure ocd but recently it’s been sooo much better but i’m in a relationship and me and my bf dated before about 2 years ago then we broke up and now we are back together but i’m having an issue where i will try to go back years and find something i did wrong and i really do not want to find anything to feel wrong about or guilty specifically something i may have done wrong to my boyfriend but the thing is i’m a good girlfriend and i’m very loyal so i don’t want to ruin something for me because of my past if that makes sense like i can’t remember doing anything wrong but my brain keeps going are u sure let’s look at all your interactions with people and it’s so annoying i just wanna live my life in the present does anyone have any tips

So I got dumped today by my situationship. For background, we talked for like 3 months, and I just recently lost my virginity to her. We only had sex twice. After she said we should still be friends, goofily (reassurance-seeking) I asked “but the sex was good right?” And she told me it was “good for a virgin” which hurt my feelings, then going even further she said “not in my top ten.” This made me CRY, like on the spot, right there in front of her (not the most embarrassing thing I’ve ever done…. But definitely in my top ten). I started having intrusive thoughts about how I’m unattractive/unworthy of love. She asked me why I was crying, but I just said “I don’t like myself very much,” which is always the underlying problem with me. And she reassured me that I’m “not a bad person” and “it’s not because you’re not smart or not beautiful.” But the reassurance made me spiral more, bc I was thinking “I didn’t even mention feeling unattractive or stupid, she can just tell that I am.” Then it kept getting worse and worse, “I’m unattractive/unlovable/stupid. I’m not good at sex, I’m not good at anything.” I had to stop myself and realize it was OCD obsessing over the things “wrong” with me. I think I started this post wanting reassurance, but now I think I want to know if anyone has any tips on accepting criticism as someone with OCD, bc it always sends me down a “there is something wrong with me” spiral.