dealing with unhealthy obsessions

So I was talking to this one polyamorous guy but we had been friends before we started talking romantically. Anyway one day he has a mental breakdown and he says he can't do polyamory rn (for reasons I won't get into but I think they're valid) and I was like that's fine. But now it just feels like we can't talk to each other. I am either terrified that I won't be able to talk to him cause I will be too upset or I am terrified he won't talk to me because he hates me. We used to talk nonstop everyday but now we haven't talked for three days. And I don't know if it's me or him, or maybe I am just losing it. But all I want to do is talk to him. I am always checking his socials just trying to see if he's online and wondering if he will or why won't he text me. Anytime we do talk, it's always like a two sentence exchange. Maybe it's him, maybe he needs space, but everytime I see him (we go to college together) he seems to be happier, everytime he posts on twitter he seems happier, I don't know. I just want him to like me. I want to talk to him. I am scared I have to stop talking to him completely, because in the past I have never gotten over someone unless someone else comes in and takes their place so it isn't like we can take a break and then I come back and everything's good. It would likely take a long time, and it's only been like 4 months since we started talking 😭 (I am so cooked). I don't know why I am like this. I wish I could be normal about him/other people. I don't know if I am just in an OCD spiral or not, but I just want it to be over. Sorry for the rambling, but if anyone has any advice I will consider it.

the most debilitating ocd flare-up i’ve been having for the past few months has been about the guy i used to talk to. we weren’t dating per-se, but whatever was going on between us was very confusing and unclear, and it ended up with me being very hurt. he was basically leading me on, and couldn’t commit to me. it’s been months since we’ve stopped talking and i still can’t stop thinking about him. i don’t even care about him that much in an objective sense, but i am genuinely obsessed with him. everything i see reminds me of him, and my mind is constantly running through thoughts about him and our situation — why did it go the way it did, what did i do wrong, does he still think about me, etc. it’s honestly so humiliating and makes me feel pathetic because i know he’s probably moved on by now, and i still can’t handle the thought or sight of him. i just wish i could stop ruminating, because it’s gotten so bad that i can’t focus on school or anything else in life. it’s so constant to the point where, when i bring it up to my friends (which is very often), i’m met with concern and even frustration rather than sympathy. how can i cope with the rumination? it’s genuinely exhausting, and i can’t sleep at night because my brain is just running like a motor. i have dreams about it almost nightly as well. anything helps!

any help is really welcomed and appreciated. I tend to hyper fixate on men outside of my relationship, they feel like crushes but I’m like 60% sure they’re meaningless dopamine rushes that happen with people I find interesting, friendship worthy, or physically appealing in some way. My hyperfixation recently shifted to a supervisor, not even an hour after meeting him :/ that’s fine, whatever, I can’t do much about it. I daydream and create like this drama romance in my head. Like good content for a movie or a book. Comparing it to that makes me feel less disloyal, and more understanding of why this might happen (I am a hopeless romantic, I adore stories). I’m home now and I was thinking of wearing a cuter shirt for work tomorrow because I went in an oversized hoodie today. This is a thought I had this morning before even meeting this man btw. But then my brain went to oh yeah I want to look attractive for this hyper fixation. It felt exciting to think that. I felt excited. Then the huge wave of dread hit me. I wanted to look good for another man? For a specific person? I can’t stop panicking I don’t know if this is normal, disloyal, a distortion, or what it is. I’m so confused. I felt happy when I got that thought. Maybe it was a dopamine hit or something I’m Colombian and we’re really big on looking our best 99.9% of the time. Even if it’s just to go to the gas station. I just feel so scared that I felt excitement over this one person. It’s extremely different for my boyfriend’s culture. Almost the opposite. I feel so disloyal and unworthy of my boyfriend. I doubt this was intrusive, it genuinely felt like me and I’ve had thoughts like that in the past. I just feel like a huge monster right now Please help :(