Which one is correct to use in this context?(all pronouns refer to the same people)
Your best friend is you.
Your best friend is yourself.
Our best friends are ourselves.
Our best friends are we.
Our best friends are us.
My best friend is myself.
My best friend is me.
My best friend is I.
Her best friend is herself.
Her best friend is her.
Her best friend is she.
And what about these sentences?
My friend is she.
My best friend is her.
Her best friend is I.
Her best friend is me.