NL200 now that I backdoor my Flush, he overpushes

[Herrigel]

Opponent is like 30/20/2.
Losing player so far, but I only have a couple of hundred hands mined so far...

Party Poker No-Limit Hold'em, $2 BB (6 handed) Hand History converter Courtesy of PokerZion.com

Hero ($235)
SB ($489.65)
BB ($214.80)
UTG ($250)
MP ($176.95)
CO ($226.40)

Preflop: Hero is Button with J[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, MP calls $2, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $9</font>, SB calls $8, <font color="#666666">1 fold</font>, MP calls $7.

Flop: ($29) 5[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets $5</font>, MP calls $5, Hero calls $5.

Turn: ($44) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets $25</font>, MP folds, Hero calls $25.

River: ($94) Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB calls $450.65 (All-In), Hero shrugs. ($196 to call)