50NL tough decision on a two pair flop

[PureNHL]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $54.70
BB: $66.25
UTG: $40.75
CO: $12.80
Hero (BTN): $186.05

Preflop: Hero is dealt 6[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/club.gif[/img] (5 Players)
BB calls $0.50, 2 folds, <font color="red">Hero raises to $2.00</font>, SB folds, BB calls $1.50

Flop: ($4.50) 5[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">BB bets $4.50</font>, <font color="red">Hero raises to $11.00</font>, <font color="red">BB raises all-in to $64.25</font>, <font color="orange"> Hero ??????? </font>


Is this an easy call or fold? No reads on villian