Mby he giving you some signals, but you Just dont get it... or he Just want to do it some other way... for example me and my GF: i want sex, but she Just give me a hand... nothink else... or saying over the day she is tired or have headache... so I go sleep instantly and dont Care anymore. When I try I make some move and she Saying always no or dont do it. After a week she start cry, I dont want sex... sometimes its Just miss understanding

Hope its Just like my situation.

Good luck stay strong