I think one of the best things I ever heard was "God loves him more than you do."
I think this statement can be powerfully healing when we are in the throes of codependent despair...but also good to remember as we become free from the toxic ties and enter into our own deeper recovery. Sometimes guilt will continue to bubble up. Seek forgiveness from guilt, and seek clarity in discerning false guilt/blame. Pray for yourself and the still struggling. There but for the grace of god go I.