Stronger - but still confused

[Snow White]

H spent the day here today, I left at one point to do groceries, he barbequed dinner, took out the trash and recycling(he didn;t do this for a few months prior to leaving). When he was leaving he made a comment about something(I don't remember what) when he got home. I kind of looked at him funny since I thought it was odd he called his friend's house home. Then he said, I will be back tomorrow night I just didn;t have a chance to pack all my things before I came here today....


Ok question is this. He wanted to move out to clear his head because we are having the same fight over and over again. Know it appears he is moving back. How do I lay down the law without starting the fight before he even steps a foot in the door? I want him to come back, but I want the rest to be over.