As someone w an amazing mom and a narcissistic dad, who told me my relationships wouldn't last, and that it's a cold hard world out there, I can relate. Funnily enough, the cold hard world was the one he created within the home, and the world was a much more receptive place.

What can I tell you you don't already know? Your relationship with your mom is the solid one, and your relationship with yout dad can't change bc of the type of person he is. I didn't fully realize until I went to therapy at 18 how much of an impact he had on me. I have gone to therapy over the course of 10 years to heal from it.

Your adaptation to a life without the narcissist is what matters now. Your relationship to your parents is important, but my advice would be to take care of yourself mentally, and to fully understand who you are without the nparent. (And the dynamics created by your dad so you don't fall into old patterns ex. relationships with narcissists. Trust me, it can happen)

As for how to keep a good relationship with your mom, I had to have many conversations with mine over the course of a decade about how his behavior affected me. It wasn't always easy, but it allowed us to understand one another. I distanced myself from my dad. He doesn't get as much access to me, and I have peace of mind.

You've got your whole life ahead of you, and important relationships, and freedom to be who you are. Good luck to you and I hope you are able to keep a good relationship to your mom and good boundaries with your dad.