That seems normal to me. That you would revisit and have dreams. Dreams seem to be unresolved issues that are getting your attention. Coming back here is one way to start to deal with it.
They do leave like their a** is on fire and their head is catching! Seems to them that its life or death. In some ways, it is for them to make drastic changes to try and address whatever they are wrestling with. I know mine did (it's not just men). Left everything and remarried a few months after the divorce was final.
Do they regret it? Who knows? I do know that when acting like you describe you can't stop it, change it, or fix it.
It's not about you. His actions are not about you.
In short, you aren't perfect, but you don't need to put up with that behavior. Job gives good advice how to handle it.
Just understand he has to work through it on his own. His feelings are his, and there's no telling what they will be from moment to moment.
Keep a healthy distance
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."