what is the best river play, assuming villain's a thinking tag player (ie capable of thin value bets, 3 barell bluffs, and folding), and he reads me for being sorta tricky/aggro but mostly tag?

this from a hand where I actually was the CO, and BB just called (typed, "good board to 3 barell all I could have is PP or flush draw"). I thought he'd have been better off check-raising me, since I might fold better hands, but not sure.


Ultimate Bet
Pot Limit Holdem Ring game
Blinds: $1./$2.
5 players
Converter

Stack sizes:
UTG: $228
CO: $221.20
Button: $38.20
SB: $395.65
Hero: $261.45

Pre-flop: (5 players) Hero is BB with 8 8
UTG folds, CO raises to $7, 2 folds, Hero calls.

Flop: 3 3 2 ($15, 2 players)
Hero checks, CO bets $11, Hero calls.

Turn: Q ($37, 2 players)
Hero checks, CO bets $24, Hero calls.

River: 4 ($85, 2 players)
Hero checks, CO bets $55, Hero...calls, folds, or pushes for 165 more