I'm terribly sorry for what I said to you. I deeply regret my actions yesterday. Please accept my sincerest apology. I'm so very sorry for what I did.
I was in the wrong when I said those things to you.
I did not mean to hurt you and now I regret it.
It was wrong of me to behave that way and I'm sorry. Nothing I say or do will take that action away... but now I want to make it up to you by apologizing. I realize my mistake now and I'm sorry.