NL25: 88 How is my line?

[Kevan0]

Villain: 31/3/2.5 over 32 hands, pretty small sample size.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.10/$0.25
6 players
Converter

Pre-flop: (6 players) Hero is Button with 8[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/spade.gif[/img]
3 folds, <font color="#cc0000">Hero raises to $1</font>, SB folds, BB calls.

Flop: 8[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/spade.gif[/img] ($2.1, 2 players)
<font color="#cc0000">BB bets $1.75</font>, <font color="#cc0000">Hero raises to $5.5</font>, BB calls.

Turn: J[img]/images/graemlins/club.gif[/img] ($13.1, 2 players)
BB checks, <font color="#cc0000">Hero bets $9</font>, BB calls.

River: A[img]/images/graemlins/heart.gif[/img] ($31.1, 2 players)
BB checks, Hero ???

How is my line so far and what to do on this river card?