Jeremy, I am a nurse in Texas. Your girlfriend's eating disorder is a symptom of a very serious underlying psycological problem. You are too young to manage this alone. She needs to see a doctor who specializes in eating disorders as quickly as possible. If money is a problem, contact your local mental health clinic and go with her for her appointments. You may very well save her life or, at the very least, help her understand that she has some options for helping herself. If her family loves her at all, they will be willing to help her through this very difficult illness.