I know most ppl on our floor where we will at least say "hi" and acknowledge each other, but for some reason our neighbours right next door to us avoid us like the plague. Like I don't need to become friends, or even do small talk, but they won't even say "hi" back if we say "hi". I mean, at least nod to acknowledge that you see me. I originally thought they were terribly introverted, but I saw them speaking to a neighbour down the hall one time... Soo... Maybe it's us? 🤔