Quote Originally Posted by make it legal
So how did you manage to overcome that lack of confidence?
Expanding your comfort zone bit by bit. Example, if you aren't comfortable hitting on hot girls, start with ones that are um, less than desireable. Build up from there.

But confidence comes from within you. Doings things that make you feel good, and feeling comfortable in your own skin and realizing it's okay to be weird and yourself. While strangers might be like "hey man he's weird, he isn't cool" the people who do care and you befriend will love you more.