I don't want to be friends with my ex
Why don't you want to be friends with your ex?
I made a mistake and I'm not interested in communicating with him again
It's very normal to not talk to your ex. If you couldn't make a relationship work it's going to be hard to be friends.
It's just better that we keep our distance.
I agree, I think it's just best to forget our past relationships and move on.