Don't get her a damn thing. Go out on the 22nd, do not contact her. Do not get her a christmas gift. Nothing, notta.

She knows how you feel for her, she doesn't need a gift as a reminder. If she gets you something, make her come give it to you, don't go to her for it. Upon receiving say "thank you", and then say you must go.

You think you feel bad, wow, just imagine how confused and lost she'd feel after that! More importantly, you'd probably be able to laugh the second she leaves after you tell her you have to go, "get out". Get some power back man.