Aggravating KJ hand

[ViperGTS]

Brand new to the table, 2nd or 3rd hand since I sat down.

PokerStars 0.25/0.50 Hold'em (10 handed) converter

Preflop: Hero is MP1 with K[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/spade.gif[/img]. MP2 posts a blind of $0.25.
<font color="#666666">2 folds</font>, UTG+2 calls, Hero calls, MP2 (poster) checks, MP3 calls, CO calls, Button calls, SB completes, <font color="#CC3333">BB raises</font>, UTG+2 calls, Hero calls, MP2 calls, MP3 calls, CO calls, Button calls, SB calls.

Flop: (16 SB) 8[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(8 players)</font>
<font color="#CC3333">SB bets</font>, BB calls, UTG+2 calls, Hero calls, MP2 folds, MP3 calls, CO calls, Button calls.

Turn: (11.50 BB) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(7 players)</font>
<font color="#CC3333">SB bets</font>, BB folds, UTG+2 calls, Hero calls, MP3 folds, <font color="#CC3333">CO raises</font>, Button folds, <font color="#CC3333">SB 3-bets</font>, UTG+2 folds, Hero folds, CO calls.

River: (19.50 BB) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">CO bets</font>, SB calls $0.50 (All-In).

Final Pot: 21.50 BB

Needless to say I would have won this hand, I'd like to at least console myself by saying I did the right thing.

Someone obviously likes their hand, it's two bets back to me with only 4 outs to have a real shot at winning (and two of those potentially making someone else a flush). SB is nearly all in, so even if I did catch the 10 I'm not going to get much more money out of him.

Good bad or too close to matter? Should I have even been in this far? I think up to that point I was OK, obviously the pre-flop raise was unfortunate.

Viper GTS