I was once a walk out spouse and my first husband asked me why and I said I don't know why. I did ask for time to myself to figure out why but he never gave me that opportunity. He pushed me until it was no turning back. See before I left him, I tried to talk to him to let him know that I was unhappy in our marriage. He told he would try but he never did. But now I know why I did....I was so exhausted from trying and pleading with him, that I had absolutely nothing left to give this marriage. I was emotionally and physically drained. I believe in my heart, if he would have given me my space, we would be married today. So what I am saying here, if you truly want your husband back, give him his space.
I am so sorry about your daughter. She is in my thoughts and prayers.