No more sex

My boyfriend and I used to have sex all the time. Now he never wants to. I try to do different positions, be sexy, and pamper him but nothing. Makes me feel and think hes bored of me and doesnt want me. I dont think hes cheating. Were together a lot of the time. I dont want sex all the time tho but when i do it doesnt happen. I also try to spice things up a bit with "games" and toys.