What Am I to You Meaning?

What I am to you is a feeling the other person has for you. Either as friends, family or boyfriend and girlfriend. See a translation.

Who am I to you means?

You can use this to question whether you, or someone else, has the right or authority to do something.

What am I to you vs Who am I to you?

If the question is asking for a specific individual, usually someone or something that can be named, then "who" is appropriate. It often implies a human specific individual, but named animals could also suffice. If the question is asking for a more general answer, what is more appropriate.