Middle Pair No Kicker

[Joujou]

Am I being too aggressive here with only 2nd pair and an overcard on the flop?

Poker Stars
Limit Holdem Ring game
Limit: $0.05/$0.1
10 players
Converter

Pre-flop: (10 players) Hero is MP3 with 6[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/club.gif[/img]
UTG folds, UTG+1 calls, 2 folds, MP2 calls, Hero (poster) checks, CO calls, 2 folds, 2 folds, BB (poster) checks.

Flop: J[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] (5.4SB, 5 players)
BB checks, UTG+1 checks, MP2 checks, <font color="#cc0000">Hero bets</font>, CO calls, BB folds, UTG+1 calls, MP2 calls.

Turn: 9[img]/images/graemlins/spade.gif[/img] (4.7BB, 4 players)
UTG+1 checks, <font color="#cc0000">MP2 bets</font>, <font color="#cc0000">Hero raises</font>, CO calls, UTG+1 calls, <font color="#cc0000">MP2 calls all-in $0.1</font>.

River: 9[img]/images/graemlins/heart.gif[/img] (12.7BB, 3 players + 1 all-in - Main pot: 12.7BB)
UTG+1 checks, <font color="#cc0000">Hero bets</font>, 2 folds.
Uncalled bets: 1BB returned to Hero.

Results:
Final pot: 12.7BB