It makes me sad sometimes, when people thank me for being nice to them

Sure, that's just a common gesture to show appreciation since not everyone is nice, but with some, you can tell they're thanking you because they're not used to people being nice to them. 😟 Especially when they use such cautious language, assuming you're going to think badly of them for some of the stuff about themselves they share with you. It shows they're used to being judged by others. I wish people had more empathy... and opened minds. 😒