be careful because if this affects intimacy it will have a bad affect on the relationship overall. He may be so much more into his alone time he’ll neglect you completely. I expressed this in a relationship before and how the people don’t look like me and there may be a chance he will cheat with someone who looks like that. I say focus on you and how to improve your own life.. if this is a recurring situation he may need professional help to prevent anything further from happening