I can “obsess” about a crush and I think a lot of it boils down to fear of being emotionally vulnerable and having a low sense of self worth (“why would anyone I fancy actually fancy me back? Nah, safer to just have a secret crush”).
I felt a normal attraction to these “unobtainable” people who all have qualities I admire. The thing that made me realise there was something deeper lurking than just a case of “unrequited love” (if they weren't, for example, married or had a significant other or even famous and I would never meet them) was when I fancied someone, my age, single, available and, crucially, interested in me.
I shit myself. Pretended I wasn’t interested. And ran away.
Then developed a fixation on a relationship with him that didn’t exist.
I worked out that I found it “less painful” to have a nice, safe crush on somebody than to actually put my emotional vulnerability “out there” and have a real, actual relationship, warts and all, with them and the possible rejection that might bring with it.
Limerence is described as a form of OCD but my personal experience is that it is more of a twisted coping mechanism for a phobia/fear of rejection.
I still see this guy maybe a couple or 3 times a year (part of hobby group) and it royally messes with my head Each. And. Every. Time. He’s moved on (understandably). He doesn’t go out of his way to talk to me now and probably thinks I’m a weirdo (understandably). I can’t do or say anything to explain my weird behaviour back then because that would just be… weird. I can imagine it now: “Hi, you remember 9 years ago when my friends told you I’d taken a shine you and it turned out you’d noticed me too, so you asked me out and I said no? Well, what I actually meant was I’d love to go out with you. But fear took over instead.”
Going completely cold turkey for ever and a day is probably the only way to stop it. That and lots of therapy to dig deep into why the fantasy is safer than the reality.
Anyway, thanks for the opportunity for that brain dump.