Sex drive

My SO and I have know that I have always had the higher sex drive. We have been together for almost a year now and been sleeping together for about 6 months. At first his hormones were giving him an equal sex drive as me, but now 6 months later I am craving sex all the time and he doesn't really feel in the mood. We started out 2-3 times a day and now we might sleep together once a week or he will let me sexually please him in other ways. What are some things I can do to no pressure him so much? Last night when he said he was no up for it after he promised me earlier we would it really upset me. As I was about to lay down he said that I pressure him a lot and it upsetted me more because I didn't know I was pressuring him.