my boyfriend wants to have sex EVERYDAY help

Long story short we've been together for several years. We started dating when we're 18 and back then I was a sexual deviant we would sneak from activities with our friends to have bathroom sex, or even some times out side (obviously in hidden places not public lol) 
Over the years my sex drive has decreased I'm only 22 but I just feel like everyday is to much. Even when I don't want to have sex he'll annoy me about it until I do (and it's never bad when we do) but I can't handle it and he can't handle not having sex Help me I want a break