Truly sorry to hear of your difficulty. I worked for a short time with anorexia sufferers so I know what a tough disease it is to beat, but am no expert. All I can say is that there doesn't seem to be any one particular cure and the treatment (nutrition, therapy, antidepressants etc) should be tailored to the individual patient's circumstances.
One thing to be aware of is the plethora of 'pro ana' websites (just google the term for further info), but basically anorexics and aspiring anorexics offer support in remaining that way and avoiding treatment. They have received a lot of criticism due to the feeling they are encouraging anorexia as a 'lifestyle choice'. This may not be relevant for you but some of these sites offer an interesting insight into what some young women are thinking.
Sorry I can't be of more help.
Flitton
That was plenty of help, thank you.