Hi
im currently recovering from bulimia, and I totally agree with something whiteboymike's 3rd paragraph (about eating disorders being a way of getting by). Oh, and i've had some "self destruction episodes" too, so no worries.
Advice:
if you can go see a therapist and get help now, do so. Or maybe rehab or something.
But if that's not possible, find a healthier way to keep yourself alive (because really, while they do kill us, eating disorders can help us survive through some really, really hideous things). What works for some people is throwing yourself completely into something. School, books, music, a period in history. I once had a friend who researched really strange/cool stuff. Movies, even. (im a hitchcock fan myself.) painting writing sculpting sewing photography cooking. Or whatever you love to do. If you have some sort of passion...Music? The arts? Cooking? I don't know. Whatever it is, immerse yourself in it.
Hope that helps, and if it didnt, pm me. Anything I can do...My reasons for bulimia are similar to yours, it seems.
Stay safe!!! :)