Also not wishing to brag. The craziest example of this I can think of from my own life is that during one particularly crazy house party during my graduate days I ended up super drunk and waking up in this girl’s bed the next morning. When I was sober I regretted it quite massively. But the morning was horrible. She said how she had liked me for ages and how everyone thinks I’m this great guy but I don’t even know it. It was truly bizarre because I never realised she liked me at all. In fact, we used to argue a lot about random topics like political things and so on. I thought I annoyed her. It was just a bizarre and awful morning.

So I suppose a corollary of “people care about you more than you know” is that you need to treat people as well as they deserve.