I wouldn't say anything to him if he's home at a decent hour (midnight perhaps?), or, if he stays out all night (since he said he might). I wouldn't let him start coming home at 2 or 3 in the morning, however, as that is disruptive to you and your sleep.
Don't call him; don't text him. If he texts YOU, ignore it.
Do you have something you can go do tonite? Don't just hang around the house. That way, you'll be legitimately busy if he tries to contact you.
