That is really wonderful that you care so much about your friend and want her to get better. It makes sense that she could do these things out of needing to have some control over her life. What could she do in order to gain more control over her life in a healthy and meaningful way? Does she have plans for the future?

Probably, the best thing that you can do to help is to continue to be a friend to her, and to tell her what a terrific person she is. You can also encourage her to get professional help. But you can't take on the responsibility yourself for making her better. Know your limits, and make sure that you are safe yourself and that your needs are being met. Also, try not to emphasize food or appearance. Telling her how slim she is might emphasize to her that weight and appearance are what matters. Trying to get her to eat will also make that the focus of attention.

Best wishes to both of you!

<font color=orange>"If we are going to insist that people pull themselves up by their own bootstraps, we must ensure that they have boots."</font color=orange>