Thanks for the responses yall. I appreciate it.
So I just got off the phone with her. She knows what she did was wrong. She knows she's lost my trust and that it's going to be hard for her to regain that. And I'm convinced that she's truly sorry.
Long story short, I forgave her for what she did, but I haven't made any decision yet as to what we're going to do about it. I don't know yet if we're going to stay together or break up. My thought right now is that this could be indicative of other, bigger problems in the relationship, and if things aren't working now, 9 more months is a long fucking time. The last week, leading up to this, has been the hardest in our relationship, and I just have to do some soul searching and decide if this relationship is something I want to hang onto.
I've decided to go on with the plans I had before this happened and travel a bit this weekend, though modified a bit--instead of running around playing tourist and trying to see as much as possible, I'm going to camp myself out in this highly recommended and very beautiful (and cheap!) castle hotel (
http://burg-colmberg.de/) a few hours from here. I'll read, sleep (since I didn't get a wink last night), write, relax, and try to figure out what needs to happen. I also think this will be good for her--she has several tests coming up, and regardless of what we end up doing, I don't want her failing out of school because of it.
Anyways, please keep the comments coming. I really appreciate everyone's insights.