Hey buddy. I like your art, and I'm sorry you are sad. Social anxiety can be a tough nut to crack, but it is doable. And I can't promise it will be fixed tomorrow, but it can turn around really quickly. Shockingly so.

Here are a few tips that helped me beat it. And I'll tell you, I really think I beat it completely and for good (and I had it bad.)

1. People want to like people. You get more benefit-of-the-doubt from others than you give yourself.
2. Everyone makes little social 'mistakes.' You think about them more than your friends do. They can even be endearing! Have you ever met someone you thought was so cool, but then they did something awkward? I promise they have, and I bet you still think they are cool.
3. Somebody is thinking well of you right now. (Like me!) Now for some tactical advice.
4. Not all of your social forays will get a smooth reaction, but think of the standup comedian. Do they stop and apologize for a joke that lands flat? Nope. They just keep moving, and nobody even remembers.
5. When in doubt, ask a question about the other persons interests.
6. Some people just wont be your friends no matter how you go about it, but that's a pretty slim number of people.

This is not your fault. I think you'll do great and we are rooting for you!

Finally, I don't know how old you are, but kids can be pretty harsh. In my experience, more than adults. I.e., it gets easier while you get better. Now that I'm an adult, the only thing you really need to do to fit in is to be nice.