It's good to move in with your fiance.
Steve was engaged to Callie who had her own apartment on the other side of town.
Steve wanted to move to the other side of town.
Steve moved in with Callie in her apartment that she was already living in.
Steve gets his own apartment a couple blocks away from Callie's apartment.
Steve and Callie saved money because they were able to split the cost of rent.
Steve couldn't afford to pay the rent on the apartment and fell behind on his bills.