About two years ago I destroyed my best friendship with a single sentence
Was it that awful?
I have to admit, at least one part of it had an impact
If you offend a friend you should apologize to them. It might be worth trying to reconcile the friendship and growing it again. At least I hope you learn from this experience to not do it again.
I'm going to stay away from it.
I hope you have at least apologized if you said something that horrible. You don't want to leave an old friend holding onto a grudge.