Imperfect_Perfection: *Fake it 'till you make it.* If you want confidence then you just have to act as if you are until you can actually feel it. Overcome your fear by doing that which scares you. Practice makes perfect.
GinnyTx: Well if serious, confidence is a turn on..(girl advice here) and cockyness is a buzz kill, so a happy medium. Do what you are good at relish that and it will spill over..
now those ways hobbies, with girls HONETSTY it's a rare medium these days and really even if not confident it works and then confidence will come. It's an allusive butterfly (seem to never had the problem but you'd be surprised even the most confident can become a bowl of jello given the right circumstances especially when scared to death of something.) If it's just girls hell picture them as not the "8" or whatevers but just a human being like yourself looking for more, and if it doesnt work out, friends beget friends and lovers