1/2 limit hand. Time to slow down?

[zinn0]

Somewhat interesting hand I had on Doyles Room earlier.

1/2 limit.

Villain *claims* to be good, but is a pretty average player.

Hero is dealt KQs in the BB.

UTG raises, 2 callers PLUS the SB (villain) calls. I call as well.

Flop 9TJ (rainbow)

Villain checks, I check, UTG bets.

both preflop callers call, Villain raises, I reraise, UTG and both preflop callers fold, Villain caps and I call.

Heads-up to the turn.

Turn 8 (this puts two clubs on the board)

Villain bets, I raise, villain reraises, I cap. Villain calls.

River brings another T. (no flush possibility)

I'm now terrified that villain has filled up.

Villain bets...

Hero?