Villain in this was pretty loose (50ish VPIP) and somewhat aggressive postflop (2ish).

My initial plan was to let him aggressivley bet at me, but as the hand progressed I began to feel less like a cat and more like a mouse. Did I play this poorly?

Party Poker No-Limit Hold'em, $ BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($112.55)
CO ($100)
Button ($258.45)
SB ($106.45)
BB ($60.58)
Hero ($100)

Preflop: Hero is UTG with A, J. CO posts a blind of $1. SB posts a blind of $0.50.
Hero raises to $4, MP calls $4, CO (poster) calls $3, 1 fold, SB (poster) calls $3.50, BB calls $3.

Flop: ($20) J, 4, J (5 players)
SB checks, BB checks, Hero bets $5, MP calls $5, CO folds, SB raises to $19, BB folds, Hero calls $14, MP folds.

Turn: ($63) 9 (2 players)
SB bets $29, Hero calls $29.

River: ($121) 2 (2 players)
SB bets $48, Hero calls $48 (All-In).

Final Pot: $217