immortalwarrior,
In the short-term you need to calm down and be stable first, like Scintillate said. How you do this depends on what you're like:
(1) Solitude works for some
(2) Do well in something (game, academic, cookery, whatever) that you know you will do well in works for some
(3) Exercise works for some
(4) If you have a special interesting (reading, gardening, computers, chess, music) DO THAT until you feel calmer.
And in general, repeat as needed!
I do know where you're coming from. I've been there too and it doesn't feel good. And it will take time for you to come out of it. And when you do come out of depression, you'll look back at yourself when you were depressed, and be able to understand stuff in a way that you can't understand right now, because you're depressed. But the very first step is to calm down a bit. You also took a very good action by coming here and writing it out. I bet that made you feel better - when you wrote it all out?