2nd nut flush w/str8 flush draw review turn play please

Been at the table 2 orbits. Villian's been very loose and very aggressive. Only early read is he seems to like any ace from any position.

PokerStars 0.05/0.10 Hold'em (9 handed) converter

Preflop: Hero is MP2 with Q[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, CO calls, Button calls, <font color="#666666">2 folds</font>.

Flop: (7.40 SB) K[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, CO calls, Button calls.

Turn: (5.20 BB) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, Button folds, Hero calls

Did I chicken out here? I don't know for certain he has the As, but based on his betting I'm sure he has the flush. After review, I thinking I should have 3-bet. Was slowing down correct and c/c the river UI? Or should I have built the pot?