narcissist is a word that often crops up, as they love themselves more than they love others.
mylifeincolour XH had 2 people on FB marked as "best friends" , me and his best mates wife..... that was after he gave her a couple of lifts. Suddenly she was his best friend, he talked about her incessantly, started hiding his phone, this all happened at the end of a month. At the start of the month he was giving me a beautiful necklace to "show me how much he loved me" !!
It happens so suddenly and I went from being the much loved wife, to suddenly being somebody who he had not loved for ages according to him.
A chance incident threw him and OW together, she made him feel like a god, and that was it, head turned and husband gone, just like that!
It totally and utterly devastated and broke me at the time due to the suddenness of it all. I truly thought I would die without him as he was my soulmate, my true love, I loved him so much and thought we were meant to be together forever, we had so much to look forward to with DC growing up and it was all snatched away from me and DC.
But yes, it DOES get better, it really really does. I tell the story with no feelings now, no emotion, no tears. It is part of my history.