a good apology for being an awful person to someone

I'm truly sorry for the way I've treated you. I know my behavior has been hurtful and I deeply regret the pain I've caused. I know that words alone can't undo the hurt I've caused, but I want you to know that I am committed to making amends and becoming a better person. Please know that I am truly sorry and I hope you can find it in your heart to forgive me.