I'm weak - continuation + flush draw goes awry

[cbloom]

Villain was on the loose side. When he just calls the flop I can't put him on a K, I rule out KK and a 3 because of the action preflop. His min raise on the turn is funny. Should I not bet continuation on the turn here? I suppose he's loose enough that K9 is possible. When he raises the turn I think I have to call with the flush draw and probably an ace being good.

Party Poker No-Limit Hold'em, $ BB (8 handed)
UTG+1 ($129.33)
MP1 ($69.92)
Hero ($105.20)
CO ($77.60)
Button ($132.40)
SB ($61.85)
BB ($117.65)
UTG ($110.35)

Preflop: Hero is MP2 with A[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $0.50.
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $3</font>, CO calls $3, <font color="#666666">1 fold</font>, SB (poster) calls $2.50, BB calls $2.

Flop: ($12) K[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets $8</font>, CO calls $8, SB folds, BB folds.

Turn: ($28) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $18</font>, <font color="#CC3333">CO raises to $36</font>, Hero calls $18.

River: ($100) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets $30</font>, Hero folds.

Final Pot: $130