You should be busy out GAL, being mysterious, keep conversations short but friendly, let him be jealous of wondering where you are.
Maybe don't be home when you know he is arriving. Or be dressed up and heading out the door, if he asks where - you could say 'meeting some friends' with a smile on your face and leave it at that.
Do not initiate any R talk
Good luck!
Oh and ... Know that not one thing you do or don't do will make or break whatever outcome in the future. Do NOT have sex with him! I bet he is going to expect you to be clingy, try to initiate sex and R talks --- so do the opposite. None of that!