I dunno If this is a cooler or what..Villain is 7/4 and can't fold postflop.

I don't get how I fold here. He'll do this with a set probably just out of boredom because he dones't play any hands. Any thoughts on how I played the hand though?

For the record I'm down about 9 100bb buy-ins in deep pots....it's killing the win rate and holding me back. I always end up never being able to fold the near nuts. (He never has QJ here so he basically has the nuts) I felt so weak tight if folding here though which I why I called. I hindsight it seems like an easy fold given the action, but is it really?

Oh yeah I don't really know why the hell I checked the turn..

PokerStars No-Limit Hold'em, $0.05 BB (9 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP2 ($3.12)
MP3 ($10)
CO ($5.27)
Button ($2.63)
SB ($5.02)
BB ($5)
UTG ($11.44)
Hero (UTG+1) ($9.03)
MP1 ($9.46)

Preflop: Hero is UTG+1 with A, A
1 fold, Hero bets $0.20, MP1 calls $0.20, 6 folds

Flop: ($0.47) 3, 10, 8 (2 players)
Hero bets $0.35, MP1 raises to $1, Hero calls $0.65

Turn: ($2.47) 7 (2 players)
Hero checks, MP1 checks

River: ($2.47) 9 (2 players)
Hero bets $2.10, MP1 raises to $8.26 (All-In), Hero calls $5.73 (All-In)

Total pot: $18.13 | Rake: $0.90

Results:
Hero mucked A, A (flush, Ace high).
MP1 had J, J (straight flush, Jack high).
Outcome: MP1 won $17.23

Guess I'm just going to start leaving tables immediately when I double up even if there's fish around since I always end up getting stacked deep.