99 against a schizo

Party 6max From Memory

Hero's Button with 9[img]/images/graemlins/heart.gif[/img]9[img]/images/graemlins/spade.gif[/img]
Folded to Hero
Hero raises to $2 (i raise 8x BB because villain is a very liberable caller from the BB)
Small Blind Calls
Villain Calls

Flop ($6): 10 [img]/images/graemlins/diamond.gif[/img]7 [img]/images/graemlins/club.gif[/img]8 [img]/images/graemlins/diamond.gif[/img]
SB Checks
Villain Checks
Hero bets $6
SB Folds
Villain Raises to $11 (all-in)

Im obviously calling this, but does anyone think this $6 bet was too aggressive? Anything I should have done diff?