Sexuality

I have always been a very sexual person, i wasn't obsessed with sex but i liked it very much. I would give myself orgasms daily and had no problem talking to people i was interested in but now i just have no sex drive and hardly have any self esteem. I just want to know how to get that confidence back, i feel bad because i hardly ever have sex with my boyfriend and i feel like i can't please him. I feel like a part of me is missing. I'm sorry if this post is all jumpy and makes no sense I'm just in need of some advice.