Fold this straight???

[TeeJayORTj]

What was I thinking here. Should I have led the river? SHould I have called the 2 back to me or did I make the right fold? Or Is the pot just too big?

UTG seemed rather passive at 35/10 with a low Agg #s until the river
CO seemed the exact same way except he was 35/1 with low Agg #s until the river

Both were at the table last hour or so.
Party Poker 10/20 Hold'em (6 max, 6 handed) converter

Preflop: Hero is SB with 4[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
UTG calls, MP calls, CO calls, <font color="#666666">1 fold</font>, Hero completes, BB checks.

Flop: (5 SB) 5[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, UTG calls, <font color="#CC3333">MP raises</font>, CO calls, Hero calls, <font color="#CC3333">BB 3-bets</font>, UTG calls, MP calls, CO calls, <font color="#CC3333">Hero caps</font>, BB calls, UTG calls, MP calls, CO calls.

Turn: (12.50 BB) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets</font>, BB calls, UTG calls, MP calls, CO calls.

River: (17.50 BB) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
Hero checks, BB checks, <font color="#CC3333">UTG bets</font>, MP folds, <font color="#CC3333">CO raises</font>, Hero folds, BB folds, UTG calls.

Final Pot: 21.50 BB