A Sexless and Non-Intimate Relationship

I am in need of advice from a supportive group of older women. The women in my life I am either not comfortable talking to them about this or they are to immature. My boyfriend, who is 31, and I, who am 21, will have been dating for two years this coming February. I want to say between 9-12 months is when the sex and intimacy stopped. It was great when our relationship first began and the things that bother him now, that being him living at his dad’s place for the time being, never bothered him when we first started out. The last time we had sex together, which was back in September, I was on top of him the whole time and the entire session lasted maybe 7 minutes. He never touched me or even wrapped an arm around me and the kissing was minimal. I love this man very much he is kind and loving, he is supportive of not just me but everyone he knows, he cares about my well being and that of others, and he wants me to succeed and help me succeed in the things I find important. He is about to close on a nice house of his very own and my hope is that with this new space that is entirely his he won’t feel uncomfortable about having sex with me anymore. My concerns are deep down that he doesn’t present the same libido as he did when we first started dating. He complains he’s tired all the time now or that his back is in pain. We’ve built a very strong and healthy relationship together and I don’t want to let that go but at the same time I’m dying over here. My sex drive is through the roof, it has always been, and I’ve got no outlet. I’ve talked to him over the course of our relationship three to four times about this issue and each time he keeps saying it’ll get better once he’s in a house of his own but I’m beginning to not believe him. He’s sweet to me but he doesn’t ever want to make out with me for a little bit or have me give him head. Am I hoping for something, that is his sex drive and desire for me, to come back that is not going to ever present itself the way it did when we first met? With time will this problem worsen and not better like I’m hoping it will? I am grateful for any advice that can be given because I am beside myself on what to do.