You need to tell her parents. At 16, there is only so much you can do and the responsibility for this girl's health is a very great one, and one that belongs to her parents.

At this point you should take care of yourself above all and STOP thinking about anorexia. Helping or not helping others with their eating disorders is just another way for you to hold on to a bad habbit from a different angle.
Get well first and lead by example not words.

I wish you the best and sorry for the tough love. I wouldn't do it if I didn't think you need it.

Research, show her pictures of what anerexic can look like when you go too far. I mean do the exterme measures where the chicks look like dead skeletons and ask her if thats what she really wants to look like? Be blunt and harsh with her. She's 13 yes, and she obviously looks up to you so she'll probably listen to you. Don't be passive agressive about it either, be flat out blunt and harsh about it. She's young and stupid she doesn't know better, (trust me we were all like that at age 13 I remember half of the dumb **** I used to do.) she's probably seeking out attention but in the end she could be killing her self esteem and confidence at a young age by being dumb. It happens. Talk to her parents as well, make it well aware to her that it isn't cool to be Pro-ana and that it's a mental illness and isn't something you would wish on your worst enemy. Don't blame yourself for her actions either that will only make matter's worse for you and make you feel bad about things you really have no control over.

I agree that you need to tell her parents. Find someone to translate if you need to. The girl may be mad at you for it, but her health is more important than that. If it were my 13 year old, I would want you to tell me. If you had a daughter in the future, wouldn't you want to be told?

It's your responsibility to get her some help, but not to help her on your own.

2 examples: When I was a high school gym teacher, a student of mine was anorexic. I called her parents who got her in with a nutritionist specializing in eating disorders. She recovered. There was also a student wrestling athlete who was bulemic. I told his coach. He recovered. I do not take responsibility for their recovery, it's just what you should do. Same thing if someone told you their plans of suicide. It is your responsibility to get that person help, but not your expertise or responsibility to do the helping.

Your plate is full. Pass this off onto parents and professionals and forgive yourself that that's all that you can do.

Congrats to you for conquering anorexia. I think that you sharing your story will help people. Focus on the bad health effects when you share and not on the weight loss aspect of it. There are serious risks, as you know, and someone who is looking at anorexia as a weight management program may not know all the bad poor nutrition will do.

Have you checked out the eating disorders part of this forum? You might find some great advice there as well.

IA with the others. I think it is fantastic that you are recovering but somebodyelse should be helping her. Is there and anorexic anon group out there? I'm not trying to be flippant, I honestly don't know.

Could you possibly call her school and talk with the councellor? This person can leave your name out of it and just say they'd observed her or something.

Grandma may be the best bet. Sounds like her little life has been ****.