

At a store? I have never met an employee like that. How would that even work? Sure, they might try to make some small talk because it helps sell things or because they are bored, but “I’m good / just looking, thanks” is all I’ve ever needed to get them to get the hint.
Bro, I’d love to change with you. I tend to be the opposite, I fear I often come off as aggressive and rude when in fact I am only pissed off at a computer for beeping the wrong way all week.
You say you have some (good) friends, have you considered just asking that? “How do you perceive me, I worry I look <x>?”