I'm not impressed

My opponent is aggressive and a little loose, but sticks to attacking weakness. This is the third orbit I've raised his BB when it's been folded to the SB, both times were also to $3 and he folded.

PokerStars No-Limit Hold'em, $1.00 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($14.35)
Button ($142.75)
Fnord ($110.30)
BB ($116.95)
UTG ($102.60)

Preflop: Fnord is SB with Khttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, Thttp://www.flopturnriver.com/phpBB2/...iles/spade.gif.
3 folds, Fnord raises to $3, BB calls $2.

Flop: ($6) Thttp://www.flopturnriver.com/phpBB2/...iles/heart.gif, Ahttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, 9http://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
Fnord bets $4, BB raises to $12, Fnord calls $8.

Turn: ($30) 3http://www.flopturnriver.com/phpBB2/...miles/club.gif (2 players)
Fnord checks, BB bets $12, Fnord calls $12.

River: ($54) 6http://www.flopturnriver.com/phpBB2/...miles/club.gif (2 players)
Fnord checks...

The turn bet looks more like valuebetting an ace than attacking weakness.

I think I am just letting this go to the flop raise, too expensive and too difficult to find out where I stand out of position here.

Also sometimes you should just check call this flop.