I'm doing mission "Escape from friendzone" using "disappear -> grown up -> come back" tactics. It is two months since I totally break contact with her. For two weeks she will arrive for christmas. But I need more time. I'm not ready

So.. how to behave if she will want to meet? Refuse? Pretend that I'm not interested? Maybe some other ideas?

(I ll spare you my thoughts on "chasing" for the moment and answer your question)
Bro you are busy, you are so busy with all the hot chicks constantly calling you and want to hang out and do stuff. Shes just a friend for you at the moment. And you need time for the opportunities thrown at you, its just impossible to fit her in your schedule this particular time.

Something in the lines of: So good hearing from you again, damn I wish we could hangout maybe I can fit you in somehow, but don't count on it.

-> then don't fit her in :3

Just my two cents: Make up your own goddam mind what you really want, wasting unique opportunities because you aren't "ready" isn't a good excuse is it?

Good luck, you'll need it with this attitude brother.

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Mindset(for newbies) -> http://www.youtube.com/watch?v=pk69Qko6_lc