Your situation, of course, is not easy. If you only stay with your wife because of the fact that you are due to do it ,but without any feelings will she be happy? Put yourself at her place.Would you like to live close to a woman who lived together with you and thought about another man? It would be a torture for you. Then you deprive her of chance to find a man who will really love her. Do you think she won't be able to find anyone to make a new family with?