My advice: You know she's leaving, so ask her about where she's going. Make her talk about what's going on in her life - there's no better way to find out than to hear it from her. Does she know where she's going, where she's going to live, how long she's going to be there, etc. Casually say something like "I know we don't talk much, but I'll probably miss you when you're gone." Just try make it sound like you would miss her as a friend.
I really wouldn't expect too much from her if she's leaving soon. She ultimately may not be interested in that way, or may not want to start something that'll end so soon, so don't be thinking that you may "hook-up". At the very least, this will be your chance to have a heart-to-heart talk with her, so you don't spend the rest of your life wondering what you could have said to her.
Of course, if it turns out she's not interested, or one of you gets embarrassed, then she'll be gone in two months, and you'll be able to get on with your life.
