Have you ever entertained the idea that maybe you are in love with a fantasy in your mind where your W is caring, honest, has integrity, is empathic, and would be loyal to the end?
If your W has had 5 affairs, I’d bet my bottom dollar she’s a narcissist. And if she is a narcissist, there’s absolutely nothing you can or should do to keep her in your life. She will be this way until the day she dies.
It took me a long time to take my rose tinted glasses off in my sitch.
I would also highly recommend you do some Google searches on recovery from a narcissistic breakup.