25NL- Semi-bluff gets tricky, I'm lost

[AAmucked]

Villain has $15.20, I cover. He limps UTG 5-handed, SB completes, I check my option in the BB with K [img]/images/graemlins/spade.gif[/img] 2 [img]/images/graemlins/diamond.gif[/img]. I've been playing pretty solid, not too crazy. This is the first semi-bluff I've made.

Flop is J [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/spade.gif[/img] Q [img]/images/graemlins/spade.gif[/img]

SB checks, I check, UTG bets .50 into .75. SB folds and I decide to get tricky and raise to 1.5. He thinks for a long time and calls.

Turn is the 2 [img]/images/graemlins/spade.gif[/img].

I tank and realize I'm not too sure what I'm beating that I can get value of without getting stacked here, so I check. He bets $3 pretty quickly and I call.

River 6 [img]/images/graemlins/club.gif[/img]

Hero checks?