"I've been with you all weekend" because I want him to stay a little longer is not what you tell your long term Girlfriend.
Well I have to agree with you on that one. If he really was in love with you, he would want to spend a bit more time with you after sex. I'm a guy and when I care about someone, I like to spend lots of time with them. I just enjoy their company.
So you two have talked about moving in together in the past? What does he say about it now? Time to talk to him again about it.
I have a long time interest in psychology, specializing in relationship dynamics for 30 years.
(Please note, we give the best advice we can based on the information given in a post. For better advice, please include the age of all romantic partners.)