That begs another question: Are we, in all sense of the word, friends?
We don't hang out, we don't go out for meals and watch movies, we don't laugh and chitter-chatter -- you know, things friends usually do.
All said, I'll probably just text her a simple message. It's harmless (at least I hope so) and it's non-relationship (well, not unless you break it down and analyze it: this career, school and exams have been a big part of our life together, be they ups or downs).