I agree with the no flirting, that's underhanded in my opinion and what people call "Mind Games", be up front and have a talk with him. It's either marriage or you go back home. Do not enter into a mortgage on a house. Who knows who will end up living there and you may end up having to fulfill your end of the contract if the two of you sign. Be very careful of someone who does not want to commit. But don't force him either. Let him make up his mind and accept that decision. The Best To You.