Having hocd towards friend is akward and gross at the same time

As I’ve posted before, my friends has developed TOUGH hocd and has hit rock bottom :// She told me to ask y’all here if any of you have had a similar experience NOT reassurance (she doesn’t have NOCD). “Hi NOCD community. When I was like 5 I had this distant female cousin whom I played with and grew up. She had super short hair like a boy, but we low key had same interests in toys/tv series etc. and then at THAT age I got a very weird though which said: do you like her? And I remember getting a lot of anxiety and my stomach hurting cause why tf would I have that kind of thought about my female cousin? I remember ruminating about it the whole day, and the next day that thought disappeared and I never had that thought again. We grew up and obviously she’s my family like my sister. But now that I have HOCD, I keep thinking about that memory and I have so much anxiety about it and cry often about it. While growing up I’ve only had crushes on tons of boys at school etc. has anyone had a similar experience?” Thanks for reading if u did! We need support 😭🙏🏻

This shit has to be one of the most confusing subtypes of ocd because no matter what you will never find clarity. When it started it wasn’t as bad and confusing because it was mostly anxiety. But when it started getting physical that’s when it got extremely confusing because I feel tension and fear when thinking of gay stuff but while testing I get arousal sensations so the big question is “if I am afraid of it how can my body respond as if I’m into it and if I’m into it how does my body respond with fear as if I’m not” and it’s endless. I wish I never started testing my arousal so I never started getting groinals to gay stuff in the first place. But there’s no going back now.

Why does Hocd latches on to a specific person?