DON'T SWEAT IT!
My son (now 15) did the same thing -- he had NO interest in using the potty, though he was absolutely ready to do so physically and psychologically.
Then one day, he came home and announced that he wanted to wear big kid pants. We went to the store, bought 15 pairs of underwear, and he was potty-trained literally overnight. What changed? I stopped talking about it and stopped begging him to use the potty!
Try this: take him to Target and let him pick out the coolest underwear. Tell him that you will put them in the bottom drawer, and he can put them on whenever he wants to. Next, completely stop ANY intervention whatsoever. Don't even use the word potty. Make sure that the potty chair is available. But don't say a word about it, or pottying, or whatever, and see what happens.
The long and short of it is you're in a battle of wills with him, and he's winning. :) Do the zen thing and stop the battle -- he'll likely just do this on his own, quickly and painlessly!