I'm also confused as to why this is James' problem and what he is supposed to do about it. There are many ways to exercise without going to a gym. Your perception seems to be that the answer is totally out of your direct control and cannot be accomplished without exerting control through your boyfriend.
Beyond that, I really don't think you should fret too much about five pounds. Most likely James doesn't act like he cares because he doesn't. That's a good thing.
