Pacific, $0.25/$0.50 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $105.49 (211 bb)
BB: $47.63 (95.3 bb)
UTG: $101.48 (203 bb)
MP: $47.67 (95.3 bb)
Hero (CO): $76.38 (152.8 bb)
BTN: $36.88 (73.8 bb)

Preflop: Hero is CO with 5 4
2 folds, Hero raises to $1.25, BTN folds, SB raises to $4.25, BB folds, Hero calls $3

Flop: ($9) 8 2 A (2 players)
SB checks, Hero checks

Turn: ($9) 6 (2 players)
SB bets $5.42, Hero calls $5.42

River: ($19.84) T (2 players)
SB bets $11.74, Hero ?

Opp 27/21 3bet SBvsCO 12% WTSD...(30/50/42) cbet in 3bet pot OOP 65% X-F- 40% agg 1.7%
We often play with him at the tables and we have a certain dynamic. During this session, he opened my bluffs in large pots a couple of times and usually played neatly through pot control. I didn't want to bet vs miss cbet because I know that he may play any top pair in a similar way.
That was some weird bet OTR because he has little value here excluding flushes because as I think he should have bet it OTF. So, can I raise his bet? And how best to play at all?