NL10 Flopped TP + Nutflushdraw

[goshax]

Poker Stars - No Limit Hold'em Cash Game - $0.05/$0.10 Blinds - 6 Players - (LegoPoker Hand History Converter)

Hero (SB): $12.00
BB: $2.55
UTG: $10.35
MP: $11.55
CO: $6.00
BTN: $10.00

Preflop: Hero is dealt A[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/spade.gif[/img] (6 Players)
UTG calls $0.10, MP folds, CO checks, <font color="red">BTN raises to $0.40</font>, Hero calls $0.35, BB folds, UTG calls $0.30, CO folds

Flop: ($1.40) 9[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] (3 Players)
Hero checks, <font color="red">UTG bets $0.10</font>, <font color="red">BTN raises to $0.50</font>, Hero calls $0.50, UTG calls $0.40

Turn: ($2.90) 2[img]/images/graemlins/diamond.gif[/img] (3 Players)
Hero checks, UTG checks, BTN checks

River: ($2.90) 3[img]/images/graemlins/diamond.gif[/img] (3 Players)
<font color="red">Hero bets $1.00</font>, <font color="red">UTG raises all-in to $9.45</font>, 2 folds

Pot Size: $13.35 ($0.20 Rake)

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Did i play this hand too passive? I didn't want to make a worse spade fold but i'm not sure this is correct. Thanks in advance.