Low sex drive...

Okay so I am 20 years old. I've been on birth control for about 5 years now. I've been in a relationship for 3 years. I have a very low sex drive and I don't know if it's because of the birth control or if it's my low self confidence. I'm still wicked attracted to my boyfriend. I get into it every now and then but not like I should be. My boyfriend seems to always be the one initiating sex and it makes him feel like I'm not attracted to him which is far from true because I love him and find him very attractive. I need some advice!! Please help ):