Villain is 'preflopdrunk' and seems fairly solid over 400 hands, running 15/13.

I think once I c-bet and he calls his range is actually pretty strong something like sets, 10-10+, maybe like 10Js or 66 but prob not as often as the nuttier part of his range. I think I prob should've just c/f'd the turn for this reason.

As played, I was thinking about b/f'ing this river as a bluff for like $15 or something since I think I could get him to fold out like 10-10/QQ, but couldn't pull the trigger.

PokerStars No-Limit Hold'em, $0.50 BB (7 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP1 ($40.15)
Hero (MP2) ($55.25)
CO ($50)
Button ($50)
SB ($51.60)
BB ($50)
UTG ($33)

Preflop: Hero is MP2 with ,
2 folds, Hero bets $1.50, CO calls $1.50, 3 folds

Flop: ($3.75) , , (2 players)
Hero bets $2.50, CO calls $2.50

Turn: ($8.75) (2 players)
Hero bets $6.50, CO calls $6.50

River: ($21.75) (2 players)
Hero checks, CO bets $24.50, Hero folds

Total pot: $21.75 | Rake: $1.05