Hi @SJD_1 and welcome to the forums .... 👋
I am so sorry to hear what you have been going through. I got "The Discard" from my soon2bX husband at the end of last year, after a few years of what looked like a dramatic personality and values change ....... turns out he was just coming out of character into his real incarnation ....... it's so shocking nobody can believe it except his family, who appear to be cut from the same cloth, but he is now by far the worst of them.
Although there is no diagnosis in place, I have been working with a counsellor, and it's pretty clear that all the dots have connnected and there is nothing left on the board closely similar to this ..... the whole pattern is now clear, including having my replacement lined up and in my life, my car, my house when I wasn't there, around a couple of my kids who are not able to defend themselves, before I knew she was there.
Anyway, we are on legal tracks because (of course) everything is "his", and (of course) he was making plans and arrangements for hike keeping me future-faked until he was ready to discard his no-linger-serving-him life and become someone else ......
Its our kids who are in a similar boat to yours, only he is pouring on the charm because he needs to make my version of events look unreal to the outside world, and he is overwriting our family history with fabrications ...... it's on helluva mess at the moment. I have to just keep wading my way through it.
There is a lot more info out there on NPD when you start looking - Dr. Armani is a good starting point, and Katie Morton. People with NPD don't usually get diagnosed because they play intense psychological games with the therapists and waste everybody's time and money, and it actually empowers them to learn about themselves and become even more deliberate in their harmful deceptions and cruel manipulations.
I would look at getting him evicted with legs support ..... without knowing your full circumstances, which should start with consulting professionals, and as @Maggie said, a counsellor will hear you, will believe you, and will be able to advise you about how to deal.
Good luck ..... and please keep walking along with us here. You are going to need ongoing community-based support to get through this.
Also, seriously invest in self-care ..... very important to your recovery and ongoing coping ability. And cut all ties if you can.
Learn the lingo - flying monkeys, word salad, future faking, narcissistic supply, grey rock, hoovering ...... it is important to both arm and shield yourself.
💖🌷