I am so sorry. What a horrible way to find out. I can't believe he didn't even tell you he filed.
Listen to your friend you have done so much to change yourself and your life. You are NOT a failure. You can't save a marriage if only 1 person is doing the work. He is making a big mistake DG.
I am here anytime you want to talk. I will keep you in my prayers to give you peace and happiness.