It is really hard to keep things together when there is so much distance and worlds apart. Your every day life is so different than hers right now. I think that I'd try to be empathetic to what it must be like for her. When she gets back, give her her space and then after the two weeks, see where she is at.
Try not to be mad. I'm sure you are more hurt than mad. I think in situations of high stress like that, you bond with who you are with. You feel distance emotionally from those at home. I've seen this happen even with people that go away for extended job training. But once they are back in their normal enviroment, life goes back to the way it was----------- usually. So, wait to see if that happens. Good luck