Hmm..Why?

I've been wondering this thing for a certain long time.. Why is that I being a normal boy, is so hard to be reached out to people? Or people are hard to reach me? I don't get it. It's like girls find it hard to talk to me or something. My friends can talk to the opposite gender with ease. But me? No. It's like I can talk to girls but just that I have no idea of what to talk about..and no girl wants to talk to me. O.o" . I think I am really screwed or something. What is wrong with me? Am I so hard to talk to? Or is it my problem that I don't start first? Can someone tell me what's my problem? Or just because I don't maintain relationships and people say that I'm a playboy or something?( Seriously, I'm not emo and don't think I am ) Can a soul tell me? I want to know the answer..