My friend and I were very harmful to someone

So, like on my last post I said, this guy was very awkward and would always say "Hi, how's your day?" every day when he saw us or something similar. I guess it was a force of habit, but we got really tired of his awkwardness. He constantly called him annoying, yelled at him, insulted him, my friend even threatened him and treated him like a sub-human monster and told him he wasn't worthy of being near us. We made him cry multiple times and even contemplate suicide. It was BAD. He was angry at us for a while, but I DID apologize, so that's good.

Now, I've been thinking. This guy and I are friends now, and I deeply regret my actions.