SO doesn't care for sex?

My SO is unlike any other man I have ever heard of. He constantly compliments my body, tells me how beautiful I look, but he just doesn't have a sex drive! He is only 28, and healthy as can be so I just don't get it! I feel like a nympho sometimes because of how badly I want him! lol. It's not as though we never have sex (obviously because I am pregnant) just not as much as a normal couple I think. How many times a week do you and your SO get intimate? And how long have you been together? (Just to see if there's any correlation there...)