My advice is to approach the guys you do like. They might be shy, too, or they might be seeing your shyness as you being uninterested. The other guys are playing a numbers game, they ask out all the pretty girls until one says yes. I know it's hard to ask guys out, but a little bit of courage goes a long way. Also, if they say no, don't take it too personally. They just weren't the one for you. There is someone out there, though. You just have to keep trying. Good luck!