Okay, I get how you're feelings, when you say that you don't have any confidence. But really, all you can do is to look at yourself in the mirror, and see what you see. Only you can improve that. Girls like guys with confidence. Confidence is incredibly sexy, so if you were to fix the confidence part, there's a chance the issue with talking to girls will fix itself.
Something you could try to do is get involved in clubs and activities in school. Meet some new people. Make new friends. Find where you fit in. If you're in a club, or you play a sport, people will be able to get to know you better, and know the things you interested in, and you'll kind of fall into place with certain people.
Good luck.
