<human>: My girlfriend is a bit fat. 

She is very self-conscious about it, she got laughed while growing up, she exercises a lot but doesn't manage to lose weight. I am very cautious about it and never mention it.

Anyway, since she couldn't lose any weight, she started making herself throw up her meals when she was 15. Her parents found out and they made her see a psy and she learnt to accept her body.

Fast forward 3 years, she now is in college and I just found out she started to do it again, not for all meals but for some. She says it's no big deal and it's just when she feels too full, but I'm scared her bad habits kick back in. I wanted to tell her parents but she says if I do that she will hate me and leave me. I'm not in the same college as her so I can't keep an eye on her all the time. Her parents got a lot of medical troubles lately and she doesn't want to be a burden.

What do I do ? I don't think she would be against some kind of help, she just doesn't want to involve her parents. Is there some kind of group/specialist/whatever I could bring her to ?

Provide a brief overview of the text.
<bot>: Girlfriend vomiting her meals now that she is far away from her parents. I can't tell her parents. What can I do ?