I am not sure what line I should take on the river. I don't think much of his range beats me. Villain is a very big fish.

$0.10/$0.25 No Limit Holdem
6 Players
Stacks:
UTG ($25)
Hero ($35.13)
CO ($25)
BTN ($44.90)
SB ($29.64)
BB ($16.53)
Pre-Flop: ($0.35, 6 players) Hero is UTG+1 A♥ J♣
1 fold, Hero raises to $1, 1 fold, BTN calls $1, 2 folds
Flop: 4♥ J♠ A♣ ($2.35, 2 players)
Hero bets $1.75, BTN calls $1.75
Turn: 5♥ ($5.85, 2 players)
Hero bets $4.75, BTN calls $4.75
River: 2♦ ($15.35, 2 players)
Hero ($27.63)?