Top pair, top kicker

It's hard to tell here if he's simply playing back at me, or if he really had a hand. With such a dangerous flop, I figured he had me. However, the thought of him having AJ, AT, A9, etc. makes me think my hand might have been good. I also noticed that I should have played it more aggressively preflop. What do you think?

$100 NL Texas Hold'em - Thursday, July 21, 14:00:05 EDT 2005
Table Table 55002 (6 max) (No DP) (Real Money)
Seat 4 is the button
Total number of players : 6
Seat 1: molly3825 ( $235.35 )
Seat 2: Cap_Betting ( $119.08 )
Seat 3: ish42tc ( $105.64 )
Seat 6: akaTheTumTum ( $129.20 )
Seat 4: dragosila ( $99.55 )
Seat 5: Sea_Lutt ( $49.26 )
Sea_Lutt posts small blind [$0.50].
akaTheTumTum posts big blind [$1].
** Dealing down cards **
Dealt to Cap_Betting [ Qc Ad ]
>You have options at Table 55039 (6 max) (No DP) Table!.
molly3825 folds.
Cap_Betting calls [$1].
ish42tc folds.
dragosila raises [$3].
Sea_Lutt folds.
akaTheTumTum folds.
Cap_Betting calls [$2].
** Dealing Flop ** [ Ac, Kc, 8h ]
Cap_Betting bets [$5].
dragosila raises [$15].
>You have options at Table 55039 (6 max) (No DP) Table!.
>You have options at Table 55039 (6 max) (No DP) Table!.
Cap_Betting folds.
dragosila does not show cards.
dragosila wins $26.65

I'm definitely opening with a raise preflop there, no need to get fancy.

The flop depends on reads, did you have any kind of a read on him?

No read. However, at this point I had established myself as a laggy player, so there could be a higher chance that he was bluffing.