K9s lots of people in on the flop being passive...

Party Poker 0.50/1 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is MP3 with 9[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img].
UTG calls, UTG+1 calls, <font color="#666666">2 folds</font>, Hero calls, CO calls, Button calls, <font color="#CC3333">SB raises</font>, <font color="#666666">1 fold</font>, UTG calls, UTG+1 calls, Hero calls, CO calls, Button calls.

Flop: (13 SB) 5[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">SB bets</font>, UTG calls, UTG+1 calls, Hero calls, CO calls, Button calls.

Should I have just called like I did, or raised this?

Turn: (9.50 BB) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, UTG checks, <font color="#CC3333">UTG+1 bets</font>, <font color="#CC3333">Hero raises</font>, CO calls, Button calls, SB folds, UTG folds, UTG+1 calls.

Right here I was just trying to get some of these people out of this pot so I could get heads up and have a better chance, plus everyone was being so passive i couldn't tell what they were holding.
What are your thoughts on the raise here?

River: (17.50 BB) 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
UTG+1 checks, Hero checks, <font color="#CC3333">CO bets</font>, Button calls, UTG+1 calls, Hero calls.

Now i this makes the flush... Just calling down was correct?

Final Pot: 21.50 BB