sounds like you have some severe mental problems and self esteem issues going on

you need to go to a theripist

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

Take positive action towards a solution so that your negative emotions do not turn inward on themselves, but instead turn into positive ones.

You'll feel better about yourself as you actively go looking for a solution.

Get out of your own head, take action, and go see a professional therapist.

It sounds like you are depressed and also have some body image issues. It's pretty common in your age group. The bast thing to do would to seek help. During adolescence, sometimes the chemicals in your brain that make you happy and sad can get out of balance as well as adolescence being a very emotional time in your life. It sounds like medications may help you and you can talk to your doctor about that, you won't have to be on them forever, just until you get yourself out of your rut and start feeling better about yourself. Many times depression is a downward spiral that won't stop until you change something in your life but don't get discouraged as this is an easily fixed problem with the right help. As for restricting calories, this may be adding to your depression as you said you get headaches and you always feel tired. This is a result of your body not getting enough nutrients to take care of itself. You can start from either side, either choosing to focus on your depression or your body image but I'm sure that when one problem begins to be solved, your body and your mind will start to feel better.

You sound depressed. You need to go get help.

Please my darling you go get yourself some help now, there are people out there that will understand and help you resolve your problems , and lead you onto an healthy path to recovery, i dont think you can do this alone though im sure you find some comfort in talking here, there are very kind supportive people on here who you can reach out to, but you must try to get professional help to.
good luck hun, i have a niece who went through same thing as your going through my dear and its been a very difficult time for her' but she hangs on in there with the love and help from her family and professionals.