Sad all around

It is sad that the person you loved for 17 years suddenly became A nobody. It is sad that I shared my true thoughts with her and now she used them against me. Things I said five or ten years ago came back to haunt me. It is sad that we still live in the same house now, but we don't talk to each other. It is sad to hear my younger daughter asked me why we all don't eat dinner together. It is sad to hear my son said, "I missed you when I am with mom and I missed mom when I am with you."
All I can say to my kids, "Everything will be ok. I will always be here for you. "
I tell to myself, time will heal. don't know how long, but it will heal.
I want to believe my wife is lost in the woods somewhere and can't find her way home. There is someone lives at our house right now to take good care of my kids, but I don't know her.  
I think I aged 5 yrs for the last 10 months.