Welcome to SR jnn3.
My next to the last ex (we were not married) developed a very serious heart condition 'just as I was ready to leave the relationship'. I chose to stand by his side at least until the prognosis was made. Then I would reevaluate.
Long story short, in the beginning, the cardiologist thought that he would need a heart transplant. Turns out, he didn't. He recovered enough with meds that he'll be on the rest of his life.
But even after the prognosis, and the deal I made with myself, I still struggled with whether to stay or go. Unfortunately, I initially tried to stay and things got very, very ugly. I think my spirit was rebelling for what was obviously the wrong choice I was making, for myself. I regret that, but I've learned.
I feel for you and your situation. I hope you find peace in whatever it is you decide to do. It may not come today, or tomorrow, but, believe that it will if you want it to.
Keep coming back.
Seeking Wisdom, Thank you for sharing. Your story has touched my heart, deeply!