Did I hold onto this too long, considering there was an overcard on the board?

Full Tilt Pot-Limit Hold'em, $0.50 BB (7 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com
MP2 ($21.25)
CO ($29.05)
Button ($30)
SB ($88.55)
BB ($54.85)
Hero (UTG) ($28.85)
MP1 ($60.35)
Preflop: Hero is UTG with 10, 10
Hero bets $1.75, 2 folds, CO calls $1.75, 3 folds
Flop: ($4.25) 8, K, 9 (2 players)
Hero bets $2.10, CO calls $2.10
Turn: ($8.45) 7 (2 players)
Hero bets $4.50, CO raises to $13.20, Hero calls $8.70
River: ($34.85) J (2 players)
Hero bets $11.80 (All-In), CO calls $11.80
Total pot: $58.45 | Rake: $2.90
Results:
Hero had 10, 10 (straight, Jack high).
CO had 9, 7 (two pair, nines and sevens).
Outcome: Hero won $55.55

Fold the turn.

That was the one point I thought I was being stupid, but was feeling a little pot committed, thus the question.

So in the future, stop being a twat and fold?

I would have to have some stats on villain to do anything crazy.

Without stats I just standard b/f the turn but make it more like $6.50.