If you really care about her, you will stick with her because you know that she is a good person at heart. Just like the last person said, it's not her talking when she's cold to you, it's the disorder. I know first hand. I can be a ***** when i am on a binge. Anyone that tried to help me is just going to get yelled at. Your girlfriend might not binge but when she feels "sick" she will get testy. When i was annorexic (before i became bulimic) i used to get very angry if something didn't go my way. If i wanted to go for a run and my family wanted me to help them with something, i got irritated. You have to give her some space, but still let her know that you're there and you care.