Character obsession issues?

I have this problem where I get obsessed with characters a lot. Like, with male characters it's usually someone I think is good-looking and I love their personality and I get like a major crush on them and actually doodle RB+(initials) all over my notebook. I get really overprotective of them and, back in the day, I actually bit someone for calling Edward Cullen gay. (It was a long time ago. Don't judge). The worst is the obsessions I get with girl characters. It's not like a crush or anything cuz i don't swing that way, but it's almost always a character I see some of myself in and everyone of these characters has had one common characteristic: crazy. Whether it's just being a bit crazy or completely psychotic (see display name) she's always crazy to some degree. With the guy obsessions, I just seem to be a little delusional and sorta think he's real, despite my better judgement. With the girls, it goes a little bit further and I actually start to wish I was that person, take on their characteristics. As you can tell by my name, my current obsession is Harley Quinn and it's getting worse by the day. I've started doing my hair in pigtails nearly every day and I've developed a bit of a joker fetish. It's starting to freak me out because next thing you know I'll be dating a murderous psychopath. What's wrong with me??