Please don't hurt yourself. As others have mentioned you're very young and you have a long life ahead of you. I know you feel that your whole world is turned upside down right now.
I suffered from depression from a very young age myself. Suicide is NOT the answer. Someone I knew committed suicide and it hurt allot of people really bad. If he only knew how much he was loved.
Please Please Please read this article on young people and suicide.
http://www.watchtower.org/e/19980908/art…
As you read it, you'll notice that what you feel is common. You're not alone. There are other things that can be done to cope with the way you feel. Just don't hurt yourself. People love you more than you know. You're still growing. Even in a couple of years or less, you will look and feel different about allot of things. You'er still discovering who you are. Allow yourself to grow up.
Talk to an adult that you trust.
If you want, email me and I can send you a link to other articles like the one above.