I don't have much to add, but do you mind me asking his age and yours? If you two are much different in age that could definitely be the problem. Also, has he had a lot of stress lately? From work and whatnot? I know that I felt like my ex wanted it too much.. Yet I still gave in to her, and I am talking after 8 hours of long, hard work (I worked 7 days a week at the time, too). So if he is working a lot he really may just be too tired and the things you are doing would just make him want it less. I know that happened with me and was part of the reason for the break up I went through.

Wishing you the best.