Hi L.,
I am sorry it has been such a struggle for you both; my heart goes out to you. I do have some recommendations for you. The recommendations come as a parent and family educator/healer as well as from my experience in my own marriage.
I would suggest that you both consider learning Nonviolent/Compassionate Communication (nvc). In my sessions with couples and parents it is one of the most effective tools I have found to help people communicate lovingly and to begin to heal relationships. There is a monthly practice group that meets at my office in central Austin. If you want more info you can contact me directly. More info about nvc at www.cnvc.org.
Secondly, I would suggest that you learn some form of heart centered meditation and/or self-calming techniques. The heart centered meditation that most people find easiest to learn is Heartmath. You can get more info at heartmath.org. The self-calming technique that I suggest is Emotional Freedom Techniques. It is based on the system of acupuncture yet you do it for yourself without needles. You can contact me to get some articles about it or go to www.emofree.com. These things would help both of you no matter what you choose to do about your relatioship.
There is a specific prayer/meditation that is designed to heal couples' relationships. If you are interested in learning it, I could send you a copy and could talk you through it over the phone.
You can also do individual sessions or a class to learn these things....just trying to keep it low cost.
Finally, I would recommend the Church of Conscious Harmony as a place to learn to be more loving and forgiving. In fact, each year the members of the congregation take on a yearly aim or intention. This year's intention is forgiveness.
Wishing you both peace, blessings and healing,
K.