Ok, I'm not sure shy is the right word, but I suppose I don't initiate conversation with people that much. If they start talking to me, then I'm fine about it and quite chatty.
A couple of people have said they find my quietness "intimidating", and they wouldn't approach me if they didn't know me, since I looked like the type who'd reject them....and boys don't like rejection.
I don't think it should be a huge problem, I mean your shyness obviously does limit the number of people you talk to or become close to, but ultimately most people will be willing to see past that. Even if I'm quiet, I get plenty of male attention, I'm almost 20 now, but at 16 most boys preferred the loud, very confident girls, so I didn't get it so much.Honestly, it does improve as you get older, purely for the fact that most people are more mature, and they won't see your shyness as a barrier.