Over all I'm happy with how I played the hand. The table was playing pretty tight and I'm trying to loosen up a little so thought this might be a good spot.

Villain is 12/6, call open 5%, fold to cbet is 80% agg freq is 27% on flop and 21% on turn sample 552 hands. Seems solid and has a win rate of 21bb/100 over those 552 hands. I have seen him raise with top set, c/r flop with a straight and call down with TPTK on a dry board.

PokerStars No-Limit Hold'em, $0.10 BB (8 handed) - PokerStars Converter Tool from FlopTurnRiver.com

Button ($10)
SB ($9.05)
BB ($5.74)
UTG ($8.35)
Hero (UTG+1) ($10)
MP1 ($7.18)
MP2 ($8.16)
CO ($10.42)

Preflop: Hero is UTG+1 with A, 4
1 fold, Hero bets $0.35, 5 folds, BB calls $0.25

So possibly a little too loose but I figured A4s gives me some straight and flush possibilities so might be good to see a flop with.

I put villain on 22-JJ, AQs+, AK. I discount QQ-AA as I think he would 3bet those and I don't think he'd be calling oop with less than AQs to an UTG+1 raise.

Flop: ($0.75) 6, 9, 8 (2 players)
BB checks, Hero bets $0.40, BB calls $0.40

NFD and villain checks I figure this is a good time for a cbet.

After his call I put him on TT-JJ and maybe floating the flop with AK or 77 figuring the flop didn't hit me. I discount 22-55 as I think he would have folded here and I discount sets as I think he would have raised.

Turn: ($1.55) 3 (2 players)
BB checks, Hero bets $0.90, BB calls $0.90

Is the double barrel here good? I figure he will definitely fold any AK or AQs+ as he still hasn't hit and definitely doesn't have any kind of draw. TT-JJ or 77 may still call and if I don't improve on the river I plan on checking it back.

River: ($3.35) 3 (2 players)
BB bets $1, Hero raises to $4.09, BB calls $3.09 (All-In)

Total pot: $11.53 | Rake: $0.56

So here's my main question........

As soon as he bet the river my gut reaction and first thought was fuck he could have a boat, I should just call.

Then I thought through the hand and figured he surely would have been raising with a set before now or possibly my read was wrong and he could have JT-KQ diamonds and have a lower flush.

So is the river shove good?