NL25 AA Turn fold... Weak or Standard?

[chavarie]

Villain is 19/4/3 over 100 hands. Nothing really out of line for him or me. I've been trying to follow my instincts in spots like these and when I analyze the villain line here I think that I'm beat a good % of the time (Sets are my main concern). Is it standard or weak?

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG+1 ($29.60)
MP1 ($5.15)
MP2 ($25.25)
MP3 ($34)
CO ($25.20)
Button ($17.25)
SB ($38.40)
BB ($2.45)
Hero ($35.10)

Preflop: Hero is UTG with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises to $1</font>, <font color="#666666">2 folds</font>, MP2 calls $1, <font color="#666666">4 folds</font>, BB calls $0.75.

Flop: ($3.10) 7[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets $1.45 (All-In)</font>, <font color="#CC3333">Hero raises to $3.5</font>, <font color="#CC3333">MP2 raises to $5.55</font>, Hero calls $2.05.

Turn: ($7.45) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players, 1 all-in)</font>
Hero checks, <font color="#CC3333">MP2 bets $12.75</font>, Hero folds.

River: ($20.20) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $7.45

Thanks!