Rough Day at 400, Could Use Some Help

[Moozh]

Had a rough day, enough to bump me back to 200 for a while. Had plenty of the usual beats, but a few of them I'm not sure. Like this one:

Villian is at two of my tables. He's 28/13/1.5 over 150 hands. I have a feeling he's a bit loose/bad from what I've seen, but the sample isn't large.

I figure the most likely hands are a set or a flush draw. I wasn't sure what I'd do on the river if the flush didn't hit, but when it did I figured it was an easy fold. Any other way to play this, or am I overthinking things? Thanks

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $2/$4
6 players
Converter

Pre-flop: (6 players) Hero is SB with A[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img]
3 folds, <font color="#cc0000">Hero raises to $14</font>, BB calls.

Flop: 2[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] ($28, 3 players)
<font color="#cc0000">Hero bets $20</font>, <font color="#cc0000">BB raises to $52</font>, Hero calls.

Turn: 9[img]/images/graemlins/spade.gif[/img] ($132, 3 players)
Hero checks, <font color="#cc0000">BB bets $132</font>, Hero calls.

River: 8[img]/images/graemlins/diamond.gif[/img] ($396, 3 players)
Hero checks, <font color="#cc0000">BB is all-in $317.6</font>, Hero folds.
Uncalled bets: $317.6 returned to BB.

Results:
Final pot: $713.6