Message Board : Pair and FD on flop; did I misplay?

This is such a basic question, I'm embarrassed to ask it.

.25/.50 full ring. I have a pretty tight image, although I'd only been on the table for a couple orbits. The villain is running about 45/20 and the reason I opened the table in the first place.

I'm wondering how bad my three-bet on the flop is considering the strength of my hand and the looseness of my opponent.

Full Tilt No-Limit Hold'em, $0.50 BB (8 handed) Full Tilt Converter Tool from http://www.flopturnriver.comFlopTurnRiver.com (Format: Plain Text)

SB ($101.50)
BB ($50)
UTG ($55.35)
Hero ($53.50)
MP1 ($9)
MP2 ($50)
CO ($50.30)
Button (Villain) ($76.90)

Preflop: Hero is UTG+1 with Qd, Jd.   
1 fold, Hero raises to $1.75, 3 folds, Button (Villain) calls $1.75, 2 folds.

Flop: ($4.25) 2d, Qh, 4d (2 players)
Hero bets $3, Villain raises to $6, Hero raises to $21, Villain folds.

Final Pot: $16.25

Did I really mess this up? In retrospect, I feel like I should have flat called the raise, planning to c/r the turn. Thoughts? Flames? Hit me.

Yeah, I still like my flop bet. But as soon as I re-raised, I regretted it. I'm almost certainly best on the flop, and there are so few cards in the deck that scare me. He could have a small pair, or just be betting an unimproved ace. I was obviously willing to play for stacks, and completely booted it.