I'm in one right now. I'm 99% sure she has Borderline Personality Disorder.

I really don't know what to do. If I'm being dead honest, I don't really care about her. I don't love her. I would be sad and nostalgic if we broke up, but I wouldn't have any sleepless nights over it.

It was one of those situations where a hook up turned into a weekly thing then an everyday thing then next thing I know she hasn't been back to her apartment in a month.

I started realizing something was wrong with her a couple months in. She gets ungodly upset over the tiniest things. She gets this out-of-body look in her eyes and starts twitching and loses all ability to reason. She wants to argue and argue about literally nothing, and whatever I say, whether I continue the argument or just go "sorry baby", has no effect. Getting away from each other usually gives her time to calm down. Whenever she gets into one of her rages, I try to explain as calmly as possible that we need to separate for a bit until she calms down, but she never goes for that. She usually says something along the lines of "you did this to me and now you don't want to deal with the consequences".

Sometimes, when the fights get really bad (it's really not so much of a fight as it is her freaking out, but sometimes I lose my temper and verbally attack her back) she threatens to call the cops on me and accuse me of rape/abuse/whatever. I don't think she would actually do it, but I had to pull the phone out of her hands one time. I know that's extremely illegal but I really don't know what I should have done in that situation.

After she is done with her rage she usually apologizes. What really gets me mad is sometimes she says something like "well you know I have BPD so you need to not do things like not respond to my text, you know what it does to me." Well bitch, why the fuck am dating you then? Are you seriously telling me I just need to put up with it?

I mostly feel bad for her. She has a lot of emotional problems. She is extremely attached to me and emotionally dependent on me. I am afraid if I broke up with her it would break her. I'm also afraid for myself, about what I would do after.

She's also hit me and done other shit like that.

I know the day is coming eventually, so right now I'm gathering evidence. I have text convos of her admitting to and apologizing for the whole false accusation thing. I have other text messages of her being racist (she really hates Asians for some reason). Not illegal, but certainly something our university would be interested in. I need to start recording her rage episodes and catch her hitting me on camera. After I have enough of that stuff, I'll break up with her in the nicest, sweetest manner I possibly can. If she threatens me with whatever, I'll explain what I have on her and what I could do with it, and that it would be best if we never contact each other again.