this is cool dream which has a lot in it to look at. my impression is that you and your girlfriend have known each other in other lives where certain events took place and came about due to your and her efforts which had positive benefit, perhaps to many people.
this is my belief system obviously which i won't force on you
just my interpret.
so you have this connection and able to dream visit with her, as though she's an ex, the connection continues on the soul level if there's a need. apparently, the need is that she threw away the hero uniform, which means to me, she needed your pep talk, as that's like throwing out the courage to live, within the ideals one struggles towards, their intentions for incarnating..she lacked the motivation perhaps to continue. So I'd say the dream is a display, within symbology, of a very real visit with her within your higher awareness stations.
hey, nice to see you back Tere.