PokerStars No-Limit Hold'em, $0.10 BB (8 handed) from (Format: FlopTurnRiver)

Hero ($10.35)
UTG+1 ($2.60)
MP1 ($14)
MP2 ($11.55)
CO ($10)
Button ($7)
SB ($9.65)
BB ($9.55)

Preflop: Hero is UTG with A, J. Hero posts a blind of $0.10. CO posts a blind of $0.10.
Hero (poster) checks, 2 folds, MP2 calls $0.10, CO (poster) checks, 1 fold, SB completes, BB checks.

Flop: ($0.50) 7, J, 5 (5 players)
SB bets $0.5, BB calls $0.50, Hero raises to $1.5, MP2 folds, CO folds, SB raises to $3.5, BB folds, Hero folds.

Final Pot: $6

Results in white below:
No showdown. SB wins $6.

Yes. He could easily have you beat here, and quite frankly probably does. The fact that BB was still in the pot when he reraised makes this even easier.

I would have probably made it more like $2 or even $2.50, however. 3x is pretty weak given there was another caller of the initial bet by SB.

TPTK here again

PokerStars No-Limit Hold'em, $0.10 BB (6 handed) from (Format: FlopTurnRiver)

Hero ($10)
MP ($4.20)
CO ($14.35)
Button ($9.65)
SB ($16.65)
BB ($1.85)

Preflop: Hero is UTG with A, Q.
Hero raises to $0.4, 3 folds, SB calls $0.35, 1 fold.

Flop: ($0.90) T, 5, Q (2 players)
SB checks, Hero bets $0.6, SB calls $0.60.

Turn: ($2.10) 3 (2 players)
SB checks, Hero bets $2, SB calls $2.

River: ($6.10) 7 (2 players)
SB bets $13.65 (All-In), Hero calls $7 (All-In).

Final Pot: $26.75

And again

PokerStars No-Limit Hold'em, $0.10 BB (8 handed) from (Format: FlopTurnRiver)

Button ($6.40)
SB ($3.30)
BB ($2.95)
UTG ($9.70)
UTG+1 ($10)
MP1 ($5.10)
Hero ($11.20)
CO ($2.70)

Preflop: Hero is MP2 with K, A.
1 fold, UTG+1 raises to $0.3, 1 fold, Hero raises to $0.9, 4 folds, UTG+1 calls $0.60.

Flop: ($1.95) A, J, 9 (2 players)
UTG+1 checks, Hero bets $1, UTG+1 calls $1.

Turn: ($3.95) 3 (2 players)
UTG+1 checks, Hero bets $3, UTG+1 raises to $8.1, Hero calls $5.10.

River: ($20.15) 6 (2 players)

Final Pot: $20.15

First hand, you posted UTG. Don't do that.

Seems in hand #2 that you will see alot of that with a spiked monster on the river rather than anything else at higher levels. Or a slowplayed set. Seems like a nice call though.

Hand #3 is decently played by your opponent, I think it would have been hard to fold that on the turn. I would have never thought AA judging the preflop action...this definitely isn't the worst player you've faced at NL $10.