2 overs w/ nut flush draw

[devilbiss]

So I was playing some micros w/ a friend and this hand comes up. He tells me I played it horrible etc. Thoughts?

PokerStars No-Limit Hold'em, $0.10 BB (8 handed) internettexasholdem.com

CO ($2)
Button ($8.45)
SB ($11)
BB ($26.15)
Hero ($9.85)
UTG+1 ($10.15)
MP1 ($10.25)
MP2 ($6.15)

Preflop: Hero is UTG with A[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises to $0.4</font>, <font color="#666666">6 folds</font>, BB calls $0.30.

Flop: ($0.85) 4[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $1</font>, <font color="#CC3333">Hero raises to $2</font>, <font color="#CC3333">BB raises to $6.2</font>, <font color="#CC3333">Hero raises to $9.45</font>, BB calls $3.25.