She's a fucking nutjob, man.
No offense.
She's a self-harmer and has some emotional and mental issues, clearly. I don't know if either of you know what you want, here.
Eddie is kind of right: If you wanted to stay in your self-destructive relationship, why would you just agree with her and give up on what was clearly a spontaneous, emotional decision on her part?
You've posted several times on here about this woman and this isn't the first set of problems you've had with her.
You haven't been with her long enough to be putting up with this shit, first of all... And despite the fact you think she's got a wonderful snatch, she withholds sex and doesn't initiate sex with you (
girlfriend-rejects-never-initiates-sex-vt184207.html)
To each his own, though. I don't know why you'd want to be with her, but if you do, just stop giving her any attention at all... Call it a freeze out if you'd like. It'll work - may not even take that long. She's exactly the type of girl a freeze out works best on (a lunatic).
She'll bounce her emotions from ultra negative to missing the fuck out of you soon enough, and at that point you take her back and wait to do it all over again in a couple months when she goes bat shit crazy again.
You're a sucker for punishment.