On the table was some regular players (not good players, but I saw them in casino many times). On LJ there was a better player who saw me play many games. He play passive and Tight. But I didnt play many hands against him. Maybe 3-4 hands, so I didnt have much reads.

My stack was around 170BB, stack of oponents was similar 100-350BB

Pre-flop situation:
Full table (8players)
UTG: straddle
UTG+1: call 2BB
LJ: call 2BB
HJ: FOLD
CO: FOLD
BTN: call 2BB
SB (Hero) AQ : raise 15,5BB
BB: FOLD
UTG: FOLD
UTG+1: FOLD
LJ: call 15,5BB (STACK around 200BB)
BTN: FOLD

FLOP - 2way (Pot 38,5BB):
A38

SB (Hero): Bet 22BB - I realize now, that I should bet more, like 28BB. But in game I didnt count chips right. I tought I am betting like 2/3 to 3/4 of pot.
LJ: call

TURN (Pot 82,5BB)
T
SB: Check
LJ (Hero): Bet 20BB
SB (Hero): call - Here I think I should FOLD and give up the hand, but this bet was small, so I just call that. Hovewer this looks like trap to me.

RIVER (Pot 122,5BB)
A
SB (Hero): Check
LJ (Hero): Bet 60BB
SB (Hero): ?

I was thinking about this game. I think it was good fold. I cant imagine what am I beating. This line was strange to me. He limp called preflop iso raise. So small pocket pairs can be in his range.

In passive low limit games, your opponents will limp/call preflop with many Ax holdings, pocket pairs, and suited cards.

Since the A on the flop is part of the flush, it reduces the number of suited combos a tighter player will hold. I would call turn and river given the size of the bets. You only need to win 25% of the time for the river call to be break-even.

Note: we would consider LJ "villain", unfortunately not everyone can be a hero.