Actions speak louder than words. Let him see and experience what you've learned, how you've changed.

If you tell him "look how I've changed!" he'll be watching and then the first time old behaviors surface (and they will) poof! Most likely, he thinks "I knew she hadn't really changed."

When old behaviors surface and you say/do something not in alignment with who you want to be, apologize. "I'm sorry I said X. That's not who I want to be or how I want to treat you."

And let it go.

Me 57/H 58
M36 S 2.5yrs R 12/13

Let me give up the need to know why things happen as they do.
I will never know and constant wondering is constant suffering.
Caroline Myss