Completely lost on this hand..

No reads on table.

** Game ID 702449690 starting - 2006-02-27 18:10:58
** Fire Open [Hold 'em] (0.05|0.10 No Limit - Cash Game) Real Money

- IndianerLars sitting in seat 1 with $5.40
- TIENSTOI sitting in seat 2 with $9.20
- blue_gesus sitting in seat 3 with $7.90
- _HoFFa sitting in seat 4 with $10.00 [Sitting out]
- thargian sitting in seat 5 with $8.41
- woflan sitting in seat 6 with $0.00 [Sitting out]
- 1EmptySeat sitting in seat 7 with $22.72
- freechus9 sitting in seat 8 with $9.65 [Dealer]
- track_girl sitting in seat 9 with $12.60
- travkingen sitting in seat 10 with $16.50 [Sitting out]

track_girl posted the small blind - $0.05
IndianerLars posted the big blind - $0.10
** Dealing card to freechus9: King of Diamonds, Queen of Spades
TIENSTOI called - $0.10
blue_gesus called - $0.10
thargian called - $0.10
1EmptySeat folded
freechus9 called - $0.10 - I didn't raise because there were so many limpers
track_girl called - $0.10
IndianerLars checked

** Dealing the flop: Queen of Hearts, 3 of Hearts, 6 of Clubs
track_girl checked
IndianerLars checked
TIENSTOI bet - $0.50
blue_gesus folded
thargian called - $0.50
freechus9 called - $0.50 - Raise here?
track_girl folded
IndianerLars folded

** Dealing the turn: 9 of Hearts
TIENSTOI checked
thargian checked
freechus9 bet - $1.50 - Didn't want to give a 4th heart on the river, and I thought I could bluff the pot with this scare card
TIENSTOI called - $1.50
thargian folded

** Dealing the river: 3 of Diamonds
TIENSTOI bet - $2.90
freechus9 folded - Villain's bet on flop then c/c on turn looks like a value bet on this river. I think I am beaten

Any thoughts on what I should have done differently/why?

Id raise the flop then check/fold the turn (or call a small bet). With that many limpers someone could very likely have TPGK destroyed.

It seems like a very loose table so a flush draw will call the flop raise anyway.

The fact that he bet out the flop then check/called that turn makes me think he has a hand (probably better than TPTK if he is a passive player).

When he value bets the river into you you can fold happily. Youve played it exactly like the flush and it scares me that he doesnt care.

fold, but consider raising the flop. Don't worry about that hand you played it well that's just one hand that you may have had the best opf on the flop but didn't work out. Though on the river i'll see people do that with qx or nothing.