Why is it when you are quiet and chill people assume you’re stuck up?

There was this co worker who would always just randomly speak to me. I never spoke first because I didn’t know him outside the fact his face was familiar but that was it. We don’t work in the same department or anything and I have no reason to interact with him. I would only speak if he spoke to me. That’s just how I am because it wasn’t like I wanted to get to know him or anything and I know I’m not obligated to speak to everyone. Eventually he stopped speaking and it didn’t matter to me until I noticed whenever I walked by after he stopped speaking he would give me a very nasty stare. One day I heard him say to another co worker “This bitch think she too good to speak.” I paid it no mind because he didn’t say it to me directly but it was weird because it was like. Why do you care if I speak to you or not?

Why is it when you are quiet and chill people assume you’re stuck up?
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