Middle Pair, sensing weakness, Donk move?

[Coz]

The villian who stuck in the hand was very loose, calling raises with a lot of overs with gutshots, middle pair etc, haven't seen him raise too much though, but I sensed weakness from his bet. The other guy I really thought was weak. What do you guys think, I am trying to pick up the aggression in my play but find I sometimes do some really dumb [censored]. What do you guys think?

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (5 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB (t1990)
Hero (t1660)
UTG (t1260)
MP (t2650)
Button (t1440)

Preflop: Hero is BB with Q[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/club.gif[/img].
UTG calls t20, MP calls t20, <font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: (t80) 2[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets t60</font>, UTG folds, MP calls t60, SB calls t60.

Turn: (t260) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, Hero checks, <font color="#CC3333">MP bets t60</font>, SB calls t60, <font color="#CC3333">Hero raises to t220</font>, MP calls t160, SB folds.

River: (t760) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero?