Is it better to just push this river?

Party Poker No-Limit Hold'em, $ BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($127)
MP ($162)
Button ($585.13)
Hero ($195.35)
BB ($177.20)

Preflop: Hero is SB with 2, 2. Hero posts a blind of $1.
1 fold, MP raises to $7, Button calls $7, Hero (poster) calls $6, 1 fold.

Flop: ($23) 2, K, 5 (3 players)
Hero bets $14, MP folds, Button calls $14.

Turn: ($51) 6 (2 players)
Hero bets $30, Button calls $30.

River: ($111) 4 (2 players)
Hero checks, Button bets $40, Hero folds.

Final Pot: $151

I think pushing the river is a good play, but I don't mind the check/fold either.

I'd rather block about 40 and fold to a raise. That way you get some FE against low/no diamond hands, and you'll know if you are beaten before your whole stack is in the middle.

why do u bet so small on the flop?

I'm trying to look like I'm trying to get a cheap turn card because I'm drawing.

hm not sure whether i like that OOP vs two villains...although if you were pretty sure one of them is going to raise you then its a good move.

river is bad spot to push, too easy for him to have nuts here

don't push ai