50NL Induced a bluff so I gotta call?

[critikal]

Villain in this hand is MP who is a 47/10 who I've frequently been isolating.

In this hand I isolate him again after he limps and the SB comes along (he's a 47/27). Villain donks into me on a ten high flop and I raise him, figure he has a weak ten? I check behind the turn for pot control (possibly bad spot?). He then bets the river when a runner flush hits. Pretty sure I have to call right?

Poker Stars, $0.25/$0.50 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

UTG: $57
MP: $64.05
Hero (CO): $53.30
BTN: $38.65
SB: $73.15
BB: $52

Pre-Flop: T[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/heart.gif[/img] dealt to Hero (CO)
UTG folds, MP calls $0.50, <font color="red">Hero raises to $2.50</font>, BTN folds, SB calls $2.25, BB folds, MP calls $2

Flop: ($8) 2[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/heart.gif[/img] (3 Players)
SB checks, <font color="red">MP bets $3.50</font>, <font color="red">Hero raises to $15</font>, SB folds, MP calls $11.50

Turn: ($38) 5[img]/images/graemlins/heart.gif[/img] (2 Players)
MP checks, Hero checks

River: ($38) 2[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">MP bets $12</font>, Hero ???