Flopped flush. Call this down? 25nl

[senorquinn]

Villain runs 40/17/3.3 over 180 hands. Do you call this down or do you fold or raise somewhere along the hand?

Poker Room skin
No Limit Holdem Ring game
Blinds: $0.15/$0.25
4 players
Converter

Stack sizes:
UTG: $25.00
HERO: $25.60
SB: $3.65
BB: $45.80

Pre-flop: (4 players) HERO is Button with 5[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img]
<font color="#cc0000">UTG raises to $0.75</font>, HERO calls, SB folds, BB calls.

Flop: K[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/club.gif[/img] ($2.4, 3 players)
BB checks, <font color="#cc0000">UTG bets $1</font>, HERO calls, BB folds.

Turn: 4[img]/images/graemlins/heart.gif[/img] ($4.4, 2 players)
<font color="#cc0000">UTG bets $3</font>, HERO calls.

River: 6[img]/images/graemlins/heart.gif[/img] ($10.4, 2 players)
<font color="#cc0000">UTG bets $5</font>, HERO ??