easy fold?

[chio]

no reads. CO poster just sat down.

Party Poker 10/20 Hold'em (6 max, 6 handed) converter

Preflop: Hero is Button with A[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/spade.gif[/img]. CO posts a blind of $10.
UTG folds, MP folds, CO (poster) checks, <font color="CC3333">Hero raises</font>, SB calls, BB calls, CO calls.

Flop: (8 SB) A[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="blue">(4 players)</font>
SB checks, <font color="CC3333">BB bets</font>, <font color="CC3333">CO raises</font>, Hero...

how easy a fold is this?
is it bad that i really didn't want to lay this down?
am i thinking like a fish here?