50NL - JJ line.. Am I too weak?

[Avocado]

Poker Stars
No Limit Holdem Ring game
Blinds: $0.25/$0.50
5 players
Converter (http://www.neildewhurst.com/hand-converter)

Stack sizes:
UTG: $29.15
CO: $92.40
Button: $51
SB: $50.25
Hero: $76.15

Pre-flop: (5 players) Hero is BB with J/images/graemlins/club.gif J/images/graemlins/spade.gif
UTG folds, <font color="#cc0000">CO raises to $2</font>, 2 folds, <font color="#cc0000">Hero raises to $6</font>, CO calls.

Flop: A/images/graemlins/heart.gif 7/images/graemlins/spade.gif 3/images/graemlins/club.gif ($12.25, 2 players)
<font color="#cc0000">Hero bets $8</font>, CO calls.

Turn: 9/images/graemlins/diamond.gif ($28.25, 2 players)
Hero checks, CO checks.

River: 7/images/graemlins/diamond.gif ($28.25, 2 players)
Hero checks, CO checks.

Results:
Final pot: $28.25

[BoozeHound]

Looks fine to me. The only thing you're trying to do by firing another barrel is move him off QQ/KK. This will be very tough to do OOP without risking a lot of money. Without a read I try to get to showdown cheaply as you did here.