Boyfriend doesn't want sex

Shauna
So I could have sex all day everyday and my boyfriend hardly wants it at all! When we first got together two years ago the sex was constant and now it's just..not. He always says "want to have sex" like we're an old married couple. 
I've told him to just surprise me and start it but he never does. 
Any suggestions on how I can get more sex from  him?!