Your line about her being my best friend made me think a lot.

The answer is: No. She is my wife.

Who is my best friend? A man. Who is also my best friend? Another woman. The man doesn't know who I really am, but I love him for who he is. The woman is someone I wanted to start a relationship with a very long time ago. But it was not meant to be. Today she knows everything about me and I know almost everything about her.