Uncomfortable hand against a LAG, did I play this like a fish?

[marand]

CO is Very loose and very aggressive. (About 50/30/2)

Party Poker 10/20 Hold'em (6 max, 6 handed) converter

Preflop: Hero is SB with J[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">1 fold</font>, CO calls.

Flop: (7 SB) 9[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, Hero calls.

Turn: (5.50 BB) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets</font>, Hero calls.

River: (7.50 BB) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets</font>, Hero calls.

Final Pot: 9.50 BB

Preflop is very easy, but I don't feel comfortable in the rest of the hand.
I had planned to fold on a 4-flush on the turn.
I think he most likely has a pair or a flushdraw on the flop. Thoughts?

[spydog]

Looks standard to me. I don't see how you can play this any differently.

[Jonny Melon]

Yes, this is fine, esp. since you will fold to a [img]/images/graemlins/diamond.gif[/img]

[JrJordan]

Meh, he could be raising a diamond and you have at least 4 clean outs. I'm ok with a call down.