Should I be scared?

[Chaostracize]

2/4 Party full game. I'm on the button with K [img]/images/graemlins/spade.gif[/img] K [img]/images/graemlins/heart.gif[/img]. Folded to CO who raises, I 3-bet, blinds fold, and he calls. I don't know if this means anything but he's sitting with a little more than 350 dollars.

Flop comes: Q [img]/images/graemlins/club.gif[/img] J [img]/images/graemlins/spade.gif[/img] 2 [img]/images/graemlins/club.gif[/img].

He checks. I bet, he folds.

My question is, will I make more in the long run by checking this and letting him bet the turn? Or should I be deathly afraid of giving away that free card?