Too weak(?)

Thanks for the feedback! I hadn't really considered raising preflop, my normal play here is to limp. I guess this is another hand to bring up my PFR with.

But I do feel the flop is where I screwed up the most, choosing the worst out of three options. I am a little surprised that most seem to advocate that folding > raising though even if it seems to be thin. At what pot size is raise > fold? If we assign ourselves 6 outs we need 6.8:1 odds to continue and our pot odds here are 7:1. Is this edge too thin to push?

Anyway, the rest of the hand:

Party Poker 0.15/0.30 Hold'em (9 handed) converter

Preflop: Hero is MP3 with K[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls, MP2 calls, Hero calls, <font color="#666666">1 fold</font>, Button calls, SB completes, BB checks.

Flop: (6 SB) J[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, BB checks, MP1 checks, <font color="#CC3333">MP2 bets</font>, Hero calls, Button calls, SB folds, BB folds, MP1 folds.

Turn: (4.50 BB) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">MP2 bets</font>, Hero folds, Button calls.

River: (6.50 BB) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
MP2 checks, Button checks.

Final Pot: 6.50 BB

Results in white below: <font color="#FFFFFF">
MP2 has Ah 2h (high card, ace).
Button has 5d 5h (one pair, fives).
Outcome: Button wins 6.50 BB. </font>