What's wrong with me

I move in with my bf like 7 months ago we used to have sex everyday multiple times a day it was great now for d past last month he don't want to I even try hard to get him excited and he does he gets hard but he doest want to he always says he's tired n yea he does work hard .I even told him I do everything just lay there n keep hard then he said later but later don't come. But when we do have sex it's not just sex it's making love which I love don't know what to do. I'm horny all d time help