block this river or just c/f?

like the title says.....
comments on all streets are appreciated.

opp is fairly tight pf, not that aggressive. I was thinking that a check may allow a busted straight to get desperate and push me out, but am unsure. If you block, how much?

PokerStars No-Limit Hold'em, $2 BB (8 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

Hero ($248.35)
MP2 ($183)
CO ($59.45)
Button ($213.90)
SB ($94.75)
BB ($45.50)
UTG ($185.80)
UTG+1 ($279.85)

Preflop: Hero is MP1 with , .
2 folds, Hero raises to $6, MP2 calls $6, 4 folds.

Flop: ($15) , , (2 players)
Hero bets $10, MP2 calls $10.

Turn: ($35) (2 players)
Hero bets $18, MP2 calls $18.

River: ($71)

i hate your betsizing

i would bet 12 on flop, 26+ on turn as played, and bet fold river for a decently big amount (maybe 51). What makes you think you aren't at least 85% good here? He basically always has AK/KQ.

Also bet/f > c/f > c/c.

i can't see the river

sorry, river is a 2

I kinda agree with the past post that suggests you should bet larger, close to potting it as many hands are going to have A/draw at best and I would not be surprised if he has AQ, a set is unlikely since you hold two of the cards, and despite being passive pre-flop, letting a hand like AQ have a chance to draw out with little money in the pot is a bad move, so I can't put him on KK. However AK is still there if he thinks you would bet with AJ, so I think a block bet of $35-$40 might be enough to make him call with AK, or raise with any other hand that beats you. You have the knowledge that this board is too risky to perhaps bluff on, so if he is going to re-pop you then it's more likely he has a hand better than two pair.