What you point out is very true. An effort has to be made by both to fix the relationship. I was out of the house once a few years before the bomb. My ex asked me to come back, and my assumption was why would she ask if she wasn't willing to accept me. Well, that eventually blew up in my face.
The key to life is to move forward, be the best you can be, and if a relationship is to be healed it will. If not,m you will be in a much better place to continue life ragrdless of who is or is not in your life.
Oh...read Anger by Thich Nhat Hanh. Maybe that was a problem in your marriage if you were hitting your h a while back.