I recently messaged someone on Facebook I know from school. We're still "friends" there but we were never really close. I just knew his name and how he looked like and vice versa. He's always been a wierdo though and I remember how he was bullied and that I also had my part in this. I wasn't very nice to him.
Out of the blue, I contacted him and we had some small talk.
How are you doing, what carreer did you pursue after graduation etc.
In the midst of this awkward small talk I apologised for being mean to him years ago. His response
Oh I don't even remember that, I suffered from my parents more than anyone in school
Turns out he's been suffering from depression ever since and still is. Poor guy. I feel bad for being mean to him.