Crushed with AA?

[gutter]

200NL Full Ring Blinds $1/$2

Hero $212 on button

Villian $258 Middle Postion

SB posts $1, BB posts $2, 2 players call BB, Hero raises to $12 from Button with
A [img]/images/graemlins/club.gif[/img]A [img]/images/graemlins/heart.gif[/img], 2 players from middle position call.

FLOP ($39) 3 players

4 [img]/images/graemlins/club.gif[/img]7 [img]/images/graemlins/diamond.gif[/img]J [img]/images/graemlins/heart.gif[/img]

Checked to Hero who bets $33, Player 1 folds, Villan calls

TURN ($105) 2 PLAYERS

9 [img]/images/graemlins/diamond.gif[/img]

Villian checks,

Hero??????

I know the obvious answer is to bet, but how do I avoid losing my entire stack when he has flopped a small set? This sure seems like a set to me.