NL50 OP turned flush

OR is 31/23 on few hands, the other guy is 16/10/3.6 on 250 hands

Full Tilt No-Limit Hold'em, $0.50 BB (8 handed) - Full Tilt Converter Tool from FlopTurnRiver.com

BB ($53.60)
UTG ($17.50)
UTG+1 ($73.65)
MP1 ($18.25)
MP2 ($19.90)
Hero (CO) ($50.75)
Button ($65.25)
SB ($14.60)

Preflop: Hero is CO with Q:diamond:, Q:heart:
2 folds, MP1 bets $2, 1 fold, Hero raises to $6, Button calls $6, 3 folds

Flop: ($14.75) 9:diamond:, 7:diamond:, 4:diamond: (2 players)
Hero bets $8, Button calls $8

Turn: ($30.75) 2:diamond: (2 players)
[color=#CC3333]Hero ?