Look, I suggest if you love her get her to promise she will get help. Try and get her to be honest with you. I was told by a phone counselor, to try and get her to talk about it with you. The hardest thing about ED is people who do not have it do not understand why they can't just stop. She can not just stop if she is doing is real bad. It just doesn't work that way. It will creep back into her daily life if she just stops. For her it is all about control, so no matter what do not take that control away from her. Let her choose to get better. Like I said before a big step is honesty because most of the time people with ED will say I won't do it anymore after this date, or I just want to lose a few more pounds, I can stop anytime I want. Maybe have her create a log of when she does it, how she feels both before and after. WHat she ate, how much she ate, etc... I just realized you didn't say she has bullimia but some of my advice still applies. As for the logs if she is anorexic you can have her log how long she starves herself. What triggers a fast. What does she do to control her hunger. and more. I would call a counselor yourself. The lady I talked to on the phone was very helpful in how I should react, what to expect. Some of the people on another message board literally predicted things that were going to happen. When you start seeing that happen you know it is out of control. The thing that ultimately broke me and her up was the sneaking around. It almost felt like she was cheating on me. Any time there is a secret that is that big in a relationship it can tear you apart. You will feel it, and you will feel a loss of connection with her if it gets to a point where you think she is doing better but secretly she is not. Just don't get mad, talk to her about it and hope she is honest and lets you in.