Villian was fairly typical, 12/8/2 or so... should I be folding to the reraise here everytime? Different line all together?

PokerStars No-Limit Hold'em, $0.50 BB (9 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP3 ($30)
CO ($31.40)
Button ($44.50)
SB ($49.50)
BB ($50)
Hero ($55.70)
UTG+1 ($66.95)
MP1 ($44.50)
MP2 ($47.25)

Preflop: Hero is UTG with A, J.
Hero raises to $2, 2 folds, MP2 calls $2, 2 folds, Button calls $2, 2 folds.

Flop: ($6.75) 5, 3, 2 (3 players)
Hero bets $4.75, MP2 calls $4.75, Button folds.

Turn: ($16.25) 6 (2 players)
Hero bets $12, MP2 raises to $36, Hero raises to $48.95, MP2 calls $4.50 (All-In).

River: ($97.25) 3 (2 players, 1 all-in)

Final Pot: $105.7