My partner seems to be a narcissist

Sounds tough. Maybe you can move forward by doing just that though... if you see a therapist you could find a safe space to really explore the health of your relationship, without your partner there “correcting” you all the time, and confusing the matter? It could be something you do for YOU, not for him.

MedCircle has alot of information and advice that you may find helpful. Dr Ramani has many clips and discussions in regards to narcissism and has spent a great deal of her career dedicated to bridging today's current informational lack of awareness and the high mental risks this gap is creating within today's co-existing societies. Her passion and desire to properly educate others about the concept of narcissism and the affects and harm it creates is so enlightening.
And may even be helpful towards your search for better clarity and understanding for any decisions your currently trying to solve?
I wish to place out to you and the universe that - With strength as your backbone, and hope as your journey may the answers you need come swiftly and compassionately x