How can I make my life better?

I am almost 20 years old still a virgin. I don't know what to do with my life basically everything I do turns out to fail. I have many social problems with people, I feel different then everybody I can't never keep a conversation long enough and feel that I'm uninteresting to everyone I talk to, I have friends but I dont really have a best friend because all my friends talk about having and I don't like talking about how pathetic I am with girls, so i don't usually participate in the conversations. I have thought about therapy but too shy about the subject. I have read and done tests on my personality and I think I am narcissistic, antisocial, borderline, schizoid etc.. Maybe many more, maybe I'm just an idiot. What should I do to feel happy with my life?