Hello there! This sounds like a similar situation I face with my current girlfriend, as when we argue over something I like to talk about it and she just wants to drop it and pretend like it's already worked out. The above poster gave some great advice. It sounds like whenever she shuts off it bothers you. I guess you need to just focus on yourself in those times. Tell yourself that it's not personal and it's just how she deals with problems. You deal with problems differently. You can't expect to just change her. You can't change her and how she deals with those things. What you CAN do however is tell her when you both are in a godo mood your concerns, that sometimes when you have an argument you'd like to work on things. And ask her what she is thinking when she's in an argument. It's sometimes best to work on these things when there isn't a problem at hand.

Ultimately though, you can't change her. You CAN be supportive and patient with her and when she is shutting down just focus on yourself and your own coping skills. Good luck