Should I avoid sex my whole life?

You're only 19, stop putting so much pressure on yourself. You admit yourself this isn't really about sex, its that you don't let yourself get close to girls you're attracted to. Relationships are never easy and never perfect but when they work they are amazing. And lets face it there is no feeling like sex, it is really something you should experience in your life. Try and relax and put yourself out there. What's the worst that could happen?