You need to give more information. If you're comfortable putting the guy all in and losing because you think it won't do your table image any harm and are confident you can reach the money with the reamining stack and knowing what you do about the other opponents, then do so.
Otherwise fold.
You've also got to wonder what Donkey is putting you on. Your bet strikes me as weak. I'd put UTG on a hand he didn't want called with that sort of bet, not enough to commit themselves if re-raised, so 10-10 or AQ, AJ. He must:
1. Be the idiot you take him for
2. Have a better hand
3. Feel he can knock you off the hand you've got.

I might make the move he's made with a low wired pair (might scare you off, might flop a monster that you can't escape from, might be able to represent a kind flop - alkthough the latter is unlikley) A big pair and I'm all in, same with AK. Anything less, I'm folding.