Get a tan, haircut, whiten your teeth slightly, shave, generally clean yourself up.

My advice is to ignore her when she gets home, just go about your normal business, meet with your friends, pursue your hobbies and personal interests, maybe go for your own brief trip. Where are you from, precisely? If you're European you could book a short trainride somewhere nice in your local area, take plenty of photos, and put them in an obvious place so when she comes over she will make a note of them.