Do I have to assume a set here?

Seat 2: Gemini747 ($13.50 in chips)
Seat 3: housefly1 ($36 in chips)
Seat 4: flounder8 ($49.25 in chips)
Seat 5: Coolred ($129.35 in chips)
Seat 6: jackaroe1 ($58.55 in chips)
Seat 7: .beez. [KC,QS] ($46.75 in chips)
Seat 8: texas tom x ($41.45 in chips)
Seat 9: Tobasko777 ($51.25 in chips)
Seat 10: J__D ($46.25 in chips)


ANTES/BLINDS
J__D posts blind ($0.25), Gemini747 posts blind ($0.50).

PRE-FLOP
housefly1 calls $0.50, flounder8 folds, Coolred folds, jackaroe1 folds, .beez. bets $2, texas tom x folds, Tobasko777 folds, J__D folds, Gemini747 folds, housefly1 calls $1.50.

FLOP [board cards QD,2C,6C ]
housefly1 checks, .beez. bets $2, housefly1 bets $4, .beez. calls $2.

TURN [board cards QD,2C,6C,5S ]
housefly1 bets $6, .beez. calls $6.

RIVER [board cards QD,2C,6C,5S,10S ]
housefly1 bets $7, .beez. folds.

SHOWDOWN
housefly1 wins $30.75.



SUMMARY
Dealer: Tobasko777
Pot: $31.75, (including rake: $1)
Gemini747, loses $0.50
housefly1, bets $19, collects $30.75, net $11.75
flounder8, loses $0
Coolred, loses $0
jackaroe1, loses $0
.beez., loses $12
texas tom x, loses $0
Tobasko777, loses $0
J__D, loses $0.25

You bet half the pot on the flop...that looks like a standard continuation bet - he could just have a pocket pair and think you have Ace high...

But it's a bet/raise or fold game. Either fold the flop or reraise...I would have potted the flop - at least a $3 bet there. If he reraises you then you just lay it down.

reraise the flop to find out where you are
if he pushes then easy fold if he calls he probably has tpgk or a set. you thus need to try and keep the showdown cheap with tpgk.
looking at this i think you may be ahead and opp has you on missed overs.

way this played out i see no reason to call turn unimproved..