It's very clear he's staying with her because he thinks he owes it to both of them to try again, but it's also obvious that he never would have gone that far with it if he hadn't felt sorry for her.

What gets to me is that she thinks they were upset with her BECAUSE she left and so she thinks she was justified, but it's not that at all...it's HOW she left...if she'd talked to him and gone "I know it's a hard time for you and you need support, but this is a big opportunity for me an could make my career blah blah blah" then yeah, people would still be upset she left but they'd be a lot more accepting and forgiving because it was a decision they made together and she let him know. Instead she just left without a word and let him find out what was going on via the news, and she just doesn't get how wrong of her that was.