Bluff gone bad, did I ever have a chance?

[AcesUp2121]

Party $100 max 10 handed.
Villain has been minraising just about every flop bet throughout the session, hasn't shown down many hands. Don't know if anyone was paying attention, but my image would probably be tight aggressive.

Villain ($100) limps from MP, Button limps, small blind completes, I check Q [img]/images/graemlins/spade.gif[/img] 6 [img]/images/graemlins/diamond.gif[/img].

Flop: K [img]/images/graemlins/club.gif[/img] Q [img]/images/graemlins/diamond.gif[/img] 3 [img]/images/graemlins/club.gif[/img]
SB checks, I bet $2, Villain minraises to $4, Button and SB fold, I call.

Turn: 9 [img]/images/graemlins/diamond.gif[/img]
I bet $7, Villain minraises to $14, I go to $45, he goes into the tank and calls.

River: 2 [img]/images/graemlins/heart.gif[/img]
I set him all in for his last $60 or so.

Anybody like it? If you were the villain, what are you folding here? I was pretty surprised by what he had on the end, and I was just wondering if my line was credible at all.