Flopped flush, played correctly?

[ddss6_99]

Party Poker 0.5/1 Hold'em (9 handed) converter

<font color="blue">I was wondering if I should have even been in the hand. My thoughts were to raise if it was limped to me anyway, and the button is a weak/tight/rock so I doubt he'd make the call, and if he did I'd be pretty sure that I was behind. So I figured I'd be last to act with a hand that I planned on raising anyway. I may not have been getting good odds, but I still made the call. Was 3-betting an option here? How would you have played it?</font>

Preflop: Hero is CO with 8[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img].
UTG folds, UTG+1 calls, MP1 folds, <font color="#CC3333">MP2 raises</font>, MP3 calls, Hero calls, Button folds, SB calls, BB folds, UTG+1 calls.

Flop: (11 SB) 2[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">SB bets</font>, UTG+1 calls, MP2 folds, MP3 calls, <font color="#CC3333">Hero raises</font>, SB calls, UTG+1 calls, MP3 calls.

Turn: (9.50 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, UTG+1 checks, MP3 checks, <font color="#CC3333">Hero bets</font>, SB calls, UTG+1 folds, MP3 calls.

River: (12.50 BB) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, MP3 checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">SB raises</font>, MP3 folds, <font color="#CC3333">Hero 3-bets</font>, SB calls.

<font color="blue"> I'm pretty happy with my postflop play, but feel free to correct any mistakes I may have made. </font>

Final Pot: 18.50 BB
<font color="#009B00">Main Pot: 18.50 BB, between SB and Hero.</font>