I personally think you’re opening a can of worms by sending him letters. Toxic people won’t change even after many years passed by. But, I truly adore your kindness and the kind of heart you have. You care about them no matter how much they hurt you. You believe that people can change, you’re hoping that they would so you reach out to them even though you’re risking your own heart here. I think that’s the kind of bravery that not many have. So good luck for that! Fingers crossed for you 🤞🏻