How do i boost my self confidence?

Im a nice person, but i have developed anxiety reallly bad, especially when talking to guys.. I cant be myself.. I dont really know why.. But im a really fun outgoing person, but ppl cant really see that in me cause of the anxiety i get.. Im not ugly, im not overweight to much but i wanna lose about 20 pounds, but I dont know why i feel like this anymore. Ill i do is go to work and come home.. ive been in a slight but serious depression for about 2 yrs bc of a really bad relationship (why im not good w ppl) and im always wearing a uniform (in which i hate) and im not .. I need a huge confidence boost.. Plz help.. I would like to be myself around ppl without worring weather or not theyll like me...And i would like a boyfriend :) Help plz.. THanks