Does God actually give a person a peace about divorce in this broken world?
I am so sorry for your pain and the sorrow that you have described related to your marriage.
The fact that you feel uneasy and lack peace about the divorce is actually, I believe, a good sign
. Sister, God hates divorce
. Even when it is allowed for reasons of sin, it is still a horrible thing to have to endure. There is usually enough sin to go around in a divorce, and it should drive us all to our knees to seek Christ's forgiveness and grace.
What you really need, I believe, is not "peace
" about a divorce. But rather the peace that only comes when you submit yourself in obedience to the Lord, no matter how difficult that obedience may seem. Proverbs 28:1
says that the "righteous are as bold as a lion." That is a bold peace. Read through Psalm 119
and see how the Psalmist has joy, confidence, peace and courage. Over and over it is only because "I have kept your statutes
." As you look to God, in His Word, for guidance and direction, you will find it. And that is the only way to true peace. "You will keep him in perfect peace, Whose mind is stayed on You, Because he trusts in You
." (Isaiah 26:3)
You sound as though you have given up hope for your marriage. You say there is nothing left. Maybe this is so. Maybe you have sought the help of marriage counseling and the advice of other Godly mature believers. But I do believe God can change people. I believe you can rebuild trust even where sin has smashed it to pieces.
I would never ever tell a woman to stay in a relationship where there is not safety. Your sin does not make his sin go away. Personally I can't tell you what "obedience" will look like in your specific case.
But more important than anything is you commitment to walk in bold obedience to Christ no matter what. If that is your priority, then you can have peace and confidence that He is with you.