Hey guys. I'm hoping you can give me some advice about my girlfriend[25], of one year, who has quiet BPD, is a recovering anorexic, and has body dysmorphic disorder. I want to start by saying that I love her very much, regardless of everything I'm about to say. 

Over the span of our relationship she has been largely unaffectionate, saying that it makes her feel uncomfortable. When we have sex, which is rarely, it has to be with the light off because she can't stand how she looks naked, even though she's beautiful. She has very low self esteem. I've been able to deal with these things so far, because I know she's suffering and cannot help it.

Three weeks ago she moved into my apartment, with the idea being that she'd be closer to uni, for the new course she was starting. We were both very happy and excited. Everything was looking bright, but a few days in, the stress of uni started to show. She started becoming very angry at me for no reason. I just took it on the chin and didn't start any arguments, as I knew it was stress related, and anger wasn't exactly uncommon for her. At the end of the first week, she decided that she was moving out because it was getting too much for her. She broke down in tears saying that she was a horrible girlfriend and that I deserved so much better. She proceeded to take the majority of her stuff out of my apartment again, and stopped talking to me for a whole week, with the excuse that she was busy with uni. At the end of the week she met up with me, acted extremely cold and heartless, and promptly said she wanted a breakup. It was like she was an entirely different person. She showed no emotion whatsoever, left, and has barely spoken to me since.

I don't understand what happened, but I've seen this side of her before. When she's experiencing a lot of mental torment, she turns from a sweet little girl to this heartless person that I don't recognise. Everything about her changes, and it's like she's literally become a different person.

I'd really appreciate it if someone, with some experience with this disorder, could help me understand what might be going on? I mean we went from talking about buying a house together, to "have a nice life" in an instant. I don't think there's anyone else either, as she very rarely socialises with anyone besides me.

Thanks in advance.