What to do if your husband tells you that everything is ended in his head?

Sounds like you two need to get away for a long while. Go on a vacation where you have to spend time together without the kids. Pull out old photos when you two first fell in love and tell stories. Try to rekindle your relationship with fond memories and be the woman he fell in love with :) Maybe he will have a change of heart and it will start beating for you again! Go snuggle on the couch with him. Don't go to bed unless you're beside him!