I think we've all been there at one point or another, with my group of friends it was when we were around 19-20 it was someone in the doghouse for a month every couple months and then it would be back to the usual, still happens here and there but a lot less likely as we've ironed out (on a personal level) all the do's and don'ts so to speak
Glad to hear he doesn't seem to worried about, and so shouldn't you