MY FRIEND HAS AN EATING DISORDER PLEASE HELP!!?

my friend told me recently that she throws up on puprose, because she thinks she's fat and that she feels better after she throws up and she's also a vegetarian and doesn't eat much. she has many activities and she's constantly busy and depressed and when we get drunk she always tells us how nobody likes her and she wants to go on the road to get hit by a car. she has waaayy to many activities and she wants to be perfect everywhere i think because her parents never gave much atention to her, and they are also divorced. she is depressed and throws up few times a week, maybe even few times a day. she goes to some therapists but says they don't help her at all, but she never told them about throwing up and her depression. i really don't know what to do and i'm desperate. i think telling her mom isnt a good idea because i think she doesn't really know how to treat her and she's never home. i told my parents but they don't know what to do either. I AM SO DESPERATE, PLEASE HELP ME, I DON'T KNOW WHAT TO DO!!!!