I had alot of friends who suffured from Anorexia while I was a model. The best thing to do is get her help. Let her know that u r there for her and that u will support her in getting through this. She needs to get into a clinic or atleast with a shrink. ( sorry couldn't spell the real word) She needs alot of support and love from not only u but also from all of her friends and family. See if u can help take some of the load off of her and that will help with the stress. Don't force untill u know that she is at the breaking point. People have been known to die from it. I lost a really good friend to it. If u would like to talk or just need someone to dump on how u r feeling during this i will be glad to listen. Lots of hope a I will pray for u.