How to overcome these feelings and what to do to make friends?

I am really lonely and want to have friends, but I also feel antisocial at the same time. I have one friend (my best friend) and that is it. I am very quiet but I'm not shy. I have depression and am really somber and unhappy. I cannot laugh easily at all, and I have a hard time taking pleasure in virtually anything. When I am myself, I appear shy and sad, etc. I don't want to have to pretend I am happy or outgoing; people know when I pretend. I am so alone.