We've been dating for 9 months, we're both 20 and were virgins until at 6 months we gave it up to each other. We have a really great sexual relationship in the three months except the last 2.5 weeks he has not wanted sex or anything at all. We are still spending the same amount of time together but I (strangely?) really miss the intimacy. If I make a move on him he will go down on me for 20-30 mins and then be done, he doesn't even want me to get him off. I asked him and he said it's ok he isn't in the mood for him. I didn't really bring it up, just a passive jokey mention and he said that he doesn't know either. Any advice? To be honest I want my sex-crazed boyfriend back, where we are playing xbox one minute and on the floor the next.