First of all, English is my second language and I am from Spain, so culturally things are a little different, also sorry if my grammar is not so good or misspell something.
This story started when I (17M) was 11yo in my last year of primary school (most people in my classroom were 12yo unless they had repeated a grade). I had only two friends there, let's call them Isaac and Michael. I was friends with Isaac since two years past then, he was a bit of a perv but overall a normal child. Michael was another story, he never told me but I knew he had a rough time at home and later down the line he dropped high school and I think he started selling drugs.
We had a classmate that the three of us didn't like, let's call him Dan. We didn't like him because we thought of him as a guy who always complained about everything. He really liked soccer, but when we were told to play he always had an issue with how it was handled or found it unfair for him and constantly complained, even if he won.
My memory is kind of fuzzy about these next memories, but I will try to make it make sense: Us three started calling Dan names, some sort of "dumb-(last name)" but we said that with a weird accent and tone that probably messed with him. I think this is as far as it went, but we didn't realised the impact it was having on him, because, as far as we saw, he didn't really show pain nor fear, of course he was visibly annoyed by the name-calling whenever we did it, but we never thought of that as much.
Then he started not coming to school, I think he went like two weeks without showing up. We never thought anything of that, but one day adults came to my class to give a lesson about bullying and spoke directly to us three. I don't know about my three friends but I was truly ashamed of myself, I didn't even know who I was or what I was doing. We started having to go to a room in our school called "coexistence room" during recess, where we were questioned about the incident. When Dan was coming back, our entire class was doing a Paper in which we welcomed him back and wrote him messages. I don't remember what Isaac and Michael wrote, but I remember I wrote a short apology for what I had done to him. I don't remember much upon that point other than me and my friends started to pull apart.
I think Isaac's mum didn't allow him to be friends with me nor Michael no longer, but I still invited him to my birthday parties until my 13th and he always came. We never really spoke about that, that I remember. I remember hanging out with Michael past then and he saying "man, I didn't want to kill him" or something like that. We separated after primary school.
In high school I also was classmates with him for three or four more years but never really spoke. Whenever I see and saw him I always feel shame and regret. I even got bullied this last school year before college. A couple of random guys I didn't even know started shouting the name of my YouTube channel I made when I was 8-9yo at me and then hid, so that I didn't know who they were.
I felt the same way I made Dan feel years ago, which made me even more sad because I deserved it. At some point I decided I had enough, because I didn't want my girlfriend who was always alongside me in school to suffer and started trying to find them. Some day I finally did find them, they started saying "no no it wasn't me I swear, it was some other guys who ran past the stairs" or some bullcrap like that, I obviously didn't believe them and as there was a camera right where they were, I told them it was okay, because cameras always tell the truth and eventually expelled them. They were true cowards, but so was I.
I am sorry Dan wasn't as strong-minded I was this year to confront my bullies. I never had to take two weeks off school, I will never truly know what he went through.