Reddit, some advice would be nice if you have the time.

Hello reddit. I am currently depressed, and have been for about 2 years. Their are many reasons for this. The main reason is the complete absence of a social life. I'm talking close to zero. My "friends" I've come to realize are not really friends. For a period of time I tried very hard to gain their approval. I Even started smoking pot to try and get them to accept me. But I could tell they were sick of me. They constantly talk about their crazy plans for the weekend or what they did last weekend right in front of me and when I try to join the conversation I am interrupted or ridiculed. On top of that girls show just about as little interest in me as my friends do. And if by some fucking miracle they ever do, I'm incapable of reacting the right way because I don't know how. My best friend is most likely my dog. Im struggling in school, I honestly don't think I'm very smart at all. I just got rejected for the one school that I had any chance of getting into, so ill most likely end up going to community college, if that. and on top of that, my fingernails look like a fucking war zone because i cant stop chewing them, I have a massive cavity, and I'm overweight. Thought I am a really nice person (I don't lie, or cheat, I even go out of my way for others), nobody seems to like me, being nice has not gotten me anywhere and I think I might just give it up. I know I probably sound like a bitch and I probably am a bitch, but thank you if you took the time to read this. Just curious as to what you think I should do?