It doesn't matter anymore what caused your spouse to leave. Spending time thinking about that will just continue dragging you down. Don't blame yourself or think that he hates you so much he'd do anything to get away. It's not really about you. Something is broken within him and HE isn't the partner YOU deserve anymore. What happened during your marriage is in the past. It can't be changed and it doesn't matter! He was willing to throw away your marriage rather than honor the vows he took - in sickness and in health, right? Is that someone you can respect and love? You've taken steps to address the issues that landed you here. That's fantastic. Keep doing that. The only thing you can control is what happens next.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712