Stay the weekend with him and help do dishes, clean counters, that kind of thing. Be sure to stay in all weekend with him and help each other with the cooking. Just household chores that maximize your time together so that he will see you as the kind of girl you WANT live in your house with you (you are not to let him confuse this with a maid. Do chores TOGETHER. Don't do it yourself and don't let him do it himself. Offer to help him). And DON'T FIGHT. Then a few days after you stayed with him all that time, if it went really well mention that you had fun living with him for the weekend and later say you should do it more often. Then wait another little bit and call a friend in another room with the door open so he can hear and tell her how much fun living with him would be, being sure to mention all the things he would like to do with you if you moved in. Like if you're a sports girl, watching games together or maybe competitive board games if he's into that, for example. But between telling him how much you like spending so much time with him in his house, give it a couple days or wait for him to bring it up again before you mention it again. Let him churn it in his brain and make him feel like it was his idea.