villain is b/e - losing nit

$2/$4 No Limit Holdem
8 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG ($212.15)
UTG+1 ($406)
MP1 ($139.60)
MP2 ($370)
Hero ($400)
BTN ($196)
SB ($402)
BB ($416)

Pre-Flop: ($6, 8 players) Hero is CO
3 folds, MP2 raises to $14, Hero calls $14, 3 folds

Flop: ($34, 2 players)
MP2 checks, Hero bets $20, MP2 calls $20

Turn: ($74, 2 players)
MP2 checks, Hero bets $56, MP2 calls $56

River: ($186, 2 players)
MP2 checks, Hero goes all-in $310