GreekAlphabet asked What Do you say? when he tell you...

You are not the woman I thought you were.
You are still a girl.

This is what I'd say...

If I were being confronted:

I have never been your thoughts. I’ve always been myself. But if you believed you could transform me into your thoughts and I haven’t then I guess you failed.

If I were being judged:

You never knew me enough to form the perfect opinion.