My own advice-
Yeah, if you're blowing off steam, take a female along. If you're watching TV to wind down, find something she likes too and watch that. A really surprising thing to use are HBO series. My favorite shows are Rome, Deadwood, Game of Thrones, and True Blood... and Sons of Anarchy, but that's not on HBO. My girlfriend loves all of those shows on HBO, even Game of Thrones, though she didn't think she'd like it. If you tell them what's going on, then they take it to really good in my experience. So if I get home and am tired from school, I pop in Rome or True Blood, and she likes to watch it with me, even if I go to sleep halfway through.
In terms of training, just remind her that it's good for your body, and it makes you happy. Even girls that aren't super health conscious want to be health conscious someday, so most of them understand training from a fitness perspective.
Girls don't shy away from busy men. They actually are drawn to it, because it shows them that we at least have something going on.