In highschool, there was a girl a few years younger than me who hung herself. I was a senior pupil at the time.
A few weeks before she did, I saw her in the corridor playing pokemon, and I made some brief comment about how I play pokemon gold and stuff. I tried to be friendly with her saying that, but I was shy too, and I didn't actually say to her that she could talk to me whenever she wants, even tho that was what I wanted to say.
I also found out that a girl in my year had took the biscuit out of the girl about playing pokemon, and I felt ashamed about that, and also that my comment might have looked like I was making fun out of her too.
So I'd go back and properly say what I meant to say to her.