Fold to donk?

Villian is 23/0/.33 after 34 hands

PokerRoom 1/2 (9 handed)

Hero is Button with A [img]/images/graemlins/diamond.gif[/img] 8 [img]/images/graemlins/diamond.gif[/img]


1 fold , UTG+1 calls, 1 fold , MP2 calls, 2 folds, Hero calls, SB folds , BB checks

Flop: (4.5 SB)
8 [img]/images/graemlins/club.gif[/img] 4 [img]/images/graemlins/spade.gif[/img] 6 [img]/images/graemlins/heart.gif[/img]
3 checks, Hero bets, BB calls, 2 folds

Turn: (3 BB)
4 [img]/images/graemlins/heart.gif[/img]
BB bets, Hero calls

Flop: (5 BB)
9 [img]/images/graemlins/diamond.gif[/img]
BB bets, Hero calls

Final Pot: (12 BB)

I know 34 hands isn't enough to get a good read, but should I have called the river here? I think calling the turn is ok, given how few hands I had on him, but when he bets the river I suspect I should have let it go.