K9s: Top Pair plus Flush Draw

[underthesky]

Villain is 50/6/0.7 over 120 hands. His flop AF is 1.2. Call or push the flop?

$0.5/$1 No Limit Holdem
5 players
Converted at weaktight.com

Stacks:
UTG (<font color="#0000cc">$98.25</font>)
CO (<font color="#0000cc">$68.10</font>)
Hero (<font color="#0000cc">$98.45</font>)
SB (<font color="#0000cc">$88.65</font>)
BB (<font color="#0000cc">$98.50</font>)

Hero has K[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img]

Pre-flop: ($1.5, 5 players)
<font color="#777777">1 fold</font>, CO calls $1, <font color="#cc0000">Hero raises to $5</font>, <font color="#777777">2 folds</font>, CO calls $4

Flop: 4[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img] ($11.5, 2 players)
CO checks, <font color="#cc0000">Hero bets $8</font>, <font color="#cc0000">CO raises to $20</font>