I was @ utg straddle, 2/2
Villian raised to $15, I called my straddle with A9d
Flop: Jd24c
I check, villian cbet 26, I called
Turn: 4s,
I check once again, villian bet $52
(I knew somehow if I call this turn bet, I was preparing to call off the river, cause I had around $125 behind)
River: Kd
Hero checked final time, villian bet around $108

I felt something wasn't right, was talking 'are you stealing?
'U show me if I fold'
'Its still the same hand' (hero checking his hold cards repeatedly)
Tried to talk to villain because he 3 bet me quite a few hands previously preflop & I ended up folded. He might be using my tight image to fold me out my ace high call. I was thinking to call down my final 50ish bb....but.....

I folded, and he showed Q8s

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This might be better in a strategy section. No offense but you played it horribly and should work on some basic plays before concerning yourself with the psychological aspects of making hero calls.

It is usually easier to make hero calls the less money that is on the line.
Would you have called a $10 bet into a $10 pot? A $1 bet into a $1 pot?

There is an idea of a psychological bankroll (I read it first in "the Poker Midset" I believe") Don't play way above it, so that you play with scared money. And don't play way below it, so that you become sloppy and careless