Are both sentences OK?
You know there has been anybody but you.
You know there wil never be anybody but you.And this;
You know there has never been and never will be anybody but you.

Question

Are both sentences OK?
You know there has been anybody but you.
You know there wil never be anybody but you.And this;
You know there has never been and never will be anybody but you.

Answer

The first sentence should say "You know, there has never been anybody but you."

All the others are perfect for spoken English.