T9s vs. unknown

[afk]

Sorry, I don't have any reliable read on villain for this hand. So treat him as unknown.

I assume the preflop raise is standard. But I feel like I just got outplayed on the flop. To be honest I'm not sure why I raised. I think I didn't want to give up that easily. How would you guys play this hand? Why?

PokerStars 1/2 Hold'em (6 handed) converter

Preflop: Hero is Button with 9[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/diamond.gif[/img]. CO posts a blind of $1.
<font color="#666666">2 folds</font>, CO (poster) checks, <font color="#CC3333">Hero raises</font>, SB calls, <font color="#666666">1 fold</font>, CO folds.

Flop: (6 SB) 3[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">SB 3-bets</font>, Hero calls.

Turn: (6 BB) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero folds.

Final Pot: 7 BB