It sounds like your still in HS... I used to be close to the same, I didnt talk to people in school, just absorbed myself in books. I didnt have any friends either. Boredom sounds like a major part of why you are cutting yourself... You do need to take a deep look inside yourself and realize why it is you are feeling this way... for me it was the loss of my father when I was 10, after confronting and realizeing what the problem is it becomes a road of recovery, I would also talk to councelors in school if you have any available. If not, though its hard, tell your parrent that you NEED to see a councelor, if you dont feel like useing the word theripist, When I was in HS I found my councelors to be awesome, extreamly helpful... And as for the diet you have placed yourself on. Its a very unhealthy one. I have taken dietary classes and know how to build a good diet... find your base line requirements. And take off about 500 a day for calories, NOT reduce it to 500, if you go that low, you will actually run risks of passing out... as well as harming your stomache as it begins to feed off of your body muscles. COnverting not fat, but muscle to energy, since it burns a lot nicer... its ok not to like your weight, but dealing with it in a healthy way is key

I lost almost 50 pounds just by watching the fat content of what I ate... another big thing, cut fat out of your diet, not ALL of it, but things that are high in fat. I hope that helped