Boyfriend Thinks My High Sex Drive is a Burden

Dear Dr. Betty,
I have a question! I'm 23 years old and live with my fiance. My sex drive is through the roof and to my fiance he almost thinks its like a burden. He hasn't actually said that, but he can always tell when I'm in the mood and he like rolls over and goes to sleep. He's told me before that his friends at work wished that their wives were in the mood as much as I am. So I don't really see it as being a bad thing. Our sex life isn't boring at all, but it just seems like lately he's done a lot of the roll over and fall asleep bit.