Fold Ace high Flush??

[Endomorph]

This guy has been at the table for bout 2 rotations and done nothing of intrest.

Poker Stars - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $33.40
BB: $19.30
UTG: $63.45
MP: $22.20
Hero (CO): $25.00
BTN: $18.70

Preflop: Hero is dealt A[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] (6 Players)
2 folds, <font color="red">Hero raises to $1.00</font>, 2 folds, BB calls $0.75

Flop: ($2.10) 8[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">BB bets $1.00</font>, <font color="red">Hero raises to $3.25</font>, BB calls $2.25

Turn: ($8.60) 9[img]/images/graemlins/spade.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $5.00</font>, BB calls $5.00

River: ($18.60) 9[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">BB bets all-in for $10.05</font>, Hero???

Pot Size: $38.70 ($1.85 Rake)

After flop call i thought he might have a flush draw but also thought the set was part of his range. If he made his flush he would have pushed the turn right? Which leads to think bout folding river.