hate having sex with husband vent

so we've been together 6 years. married 1. we had a great sex life the first few years and then he lost his sex drive completely. he's 25 now. 
If we have sex (once every two weeks for the last year) I can't wait for it to be over because it's not fun. foreplay sucks. it's emotionless and passionless. all he's cared about in the last year is making me cum so fast so he can be done with it too. 
I feel extremely self conscious and empty. I've had one sex parter (like 3 times with a guy when I was 18) and him for the last 6 years. he started screwing girls very young and doing everything with them and I'm number 6 for vaginal sex and like 20 for everything else. 
it sucks.