Hello and welcome, HeatherZ...
I am divorced because I chose not to fight my ex to get her to stay. She walked away, and though there were things which I needed to deal with, none of them warranted divorce. However, her behaviour made it clear that was the path she was choosing, no matter what I did. I wouldn't wish that situation on anyone.
If I may, I'll suggest that you do three things: first, get local support from non-judgmental friends, pastors, and Christian counselors (don't waste your time with non-Christians). Second, sign up for the daily devotional from DivorceCare.org. It contains much good wisdom and experience from those who have gone before through this particular form of hell. Third, deal with your own stuff. I'm not suggesting the divorce is your fault. Rather, I recognize that everyone has stuff to deal with, and divorce is traumatic on its own. I spent quite a few hours with a Christian counselor and found freedom from junk which had plagued not only my marriage but all my relationships to that point.