I'm 16 and I think I have major depression. Long question but I really need help please?

It's so sad because I think I would be a really happy person-I have a good life and I do work a little too hard but I just feel so sad. Like, have you ever just stared at something-anything-and thought, what was put into that. You think of the person who made that thing, and wonder, are they dead now? And you think of all the things about them, like wonder did they ever have someone who loved them? Were they ever happy? I always overthink things like that. I took this quiz : a href="http://allpsych.com/tests/diagnostic/dep…" rel="nofollow"http://allpsych.com/tests/diagnostic/dep…/a and I got 12/15 which scored as major depression. I don't know what to do-I feel like I have to be perfect. I cry so much and it's so hard to concentrate in school because I can never fall asleep. I always find it really, really, hard, or almost impossible, to let things go ( like relationships). I can't really trust anyone, like my friends, and I'm always really snippy with my mom. Sometimes I look ahead inito the future and I think of my mom dead and I think I should really appreciate her now, but I don't ever show it. Well, I don't know if it's me or my mom but I just feel like I need to be perfect and I have a really good reputation and I don't know where to turn to because Ireally do think I have a serious problem. And my mom usually talks down about people who aren't... perfect. Like people who are heavy she is always critisizing them, and she critisized people she knew who had depression. Plus, I've been telling her over and over that I can never sleep but she never has done anything about it-A week ago I told her I wanted to die last summer but she didn't say anything and just told me to lay down. I don't know what to do-What should I do? I wish Icould just take some pills and be happy again.