Lack of self confidence? Please know, that God had gave an awesome life to each and everyone of people in this world. There are no rich and poor, famous and rubbish, everyone is the same. Everyone is perfect and awesome in their own way.
Never be so lonely and just want to live alone by yourself in a small room just because you don't have self confidence. Its important to have self confidence. Cheer up and never depressed all the time. Get friends with everyone. Gain your self confidence back. Be shine among everyone and don't just stand there like a stump and watch others get all the attention.
Its doesn't matter you are poor, not so smart, not so famous, as long you got self confidence, believe me everything will come to you automatically. Just gain you self confidence and be an awesome guy, like me. See, I gained my self confidence already. =)