I have decided that I have Schizophrenia.  I have come to this conclusion because I am now sure I have Capgras delusion. If I have the latter, I must have the former.

Capgras delusion is a psychiatric disorder in which a person holds a delusion that a friend, spouse, parent, or other close family member (or pet) has been replaced by an identical impostor. 

I am convinced that The Boy has been replaced with an impostor.  Therefore Capgras.  Therefore Schizophrenia.

I am happy with my new self diagnosis.  I am happy with the impostor.  I hope he sticks around.