When should i have folded? Dont think i had any stats but a feeling he is LP. I´m new to 6-max and have a constant feeling that everyone is playing back at me post flop. Its not like fullring at all.

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Poker Star Game 11629081666 / Ring Game
Table Cetus - 2007/08/22 - 12:42:53 (ET)
Blinds : 0.25/0.5
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6 players
[SB] Chuck207 (13.65)
[BB] Oerp (20.4)
[1] CClanz (20.65)
[2] afreespirit (22.05)
[3] Hero (47.5)
[B] tiltme52 (6.5)

Hero Q Q Initial Pot: 0.75

CClanz calls 0.5
afreespirit calls 0.5
Hero raises to 1
Raisy-daisy
tiltme52 raises to 1.5
Chuck207 folds
Oerp folds
CClanz folds
afreespirit calls 1
Hero raises to 2
capsy-napsy
tiltme52 calls 0.5
afreespirit calls 0.5
### FLOP ### 8 A 9 Pot: 7.25
afreespirit checks
Hero bets 0.5
tiltme52 folds
afreespirit calls 0.5
ok, he calls - but this is the same player who called pre flop and coldcalled two back to him. i guessed he could call with other hand than Ace?
### TURN ### 5 Pot: 8.25
afreespirit bets 1
he donks the turn - wtf. he could have ace, two pair or he bets with a pair to see if i really have an ace?
Hero calls 1
- dont want to raise for free showdown. i want him to continue the bluff or lower pair value betting on river
### RIVER ### 3 Pot: 10.25
afreespirit bets 1
Hero calls 1
- how bad is this? the pot is big. (since it got capped pre i felt tied to the showdown... wrong thinking?)

I think your only viable choices are raising the turn (intending to fold to a raise) or call down. I can't fold on the turn, especially in a 6-max game.
I like raising the turn a little better, but it is not a draw heavy board (unless he has J10) so neither in my eyes is a terrible option.