[Clobber]

I am hoping to find some advice from experienced Yorkie owners.
My future wife currently owns a 2.5 year old Male Yorkie. He is a great dog, and has never showed any aggression or fear towards other dogs, large or small.
I have a new 10 week old puppy, a Male boxer, and we have been trying to socialize them so they will have an easy transition when we marry.

The problem: The boxer puppy is very playful and at 10 weeks, double the size of the Yorkie. His style of play is to bark and paw/box, and chase the Yorkie. He seems fond of chewing on his hair.
The Yorkie, on the other hand, doesn't play. He is very interested in the puppy and shows no aggression towards him, but will not "rough house" with him. He will walk to him to smell, but when the boxer begins to play, he runs. Most of the time he runs himself into a corner or up against a wall and will fall and cower while barking and snapping. He never seems to actually make contact with the boxer to say "ENOUGH" and put the puppy in his place.

What can we do to help these 2 get along and form a bond? Will the Yorkie ever be interested in playing?
Anyone with a large breed puppy and Yorkie experience please help.

Thanks