KQ vs 3 bettor on Q25 flop

[JSampras1]

Villian is 14% VPIP, 10.3 PF raise, AF 3.31. I had a note on him that he 4 bet a low flop with probable high cards, then took a free card on the turn and check folded the river.

PokerStars 1/2 Hold'em (10 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is UTG+2 with K[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/spade.gif[/img]. CO posts a blind of $1.
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, MP3 calls, CO (poster) calls, <font color="#666666">1 fold</font>, <font color="#CC3333">SB 3-bets</font>, <font color="#666666">1 fold</font>, Hero calls, MP3 calls, CO calls.

Flop: (13 SB) 5[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, MP3 folds, CO folds, <font color="#CC3333">SB 3-bets</font>, Hero calls??.

Turn: (9.50 BB) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero ???

I see aggressive players do this with ak often. I'm behind to AA KK QQ AQ, and there's a good chance he has one of those. If he has KK, QQ or AQ i'm in a lot of trouble. If he has AA i still have 5 outs. I doubt he'd 3 bet JJ here, so that leaves AK, or MAYBE AJh that i'm ahead of.

Should i be folding this? I feel like this is a big leak in my game. I really don't like calling down, but i really have no idea if i should be folding this or not. For instance, i just played a hand a minute ago where i raised AK, bet and 3 bet a 10 high flop, and then bet a low turn, and the guy folded. If i am folding KQ in this situation, aren't i just giving aggressive opponents license to steal?