He still loves his wife or he would have left. He has lied to you. Face it. I don't care what you think your heart is telling you, or what you think HE has told you. She obviously loves him as well. The throwing out thing was said in the heat of the moment. She is hurting right now too. And knowing that He sees you at work must be ripping her heart out. Put yourself in her shoes. You were married.
And no, the worst part of a divorce is not the fact that you might not find someone else. IT is the WHOLE divorce. YOU need to let things cool down as well. You have JUST left a relationship and have no business jumping into another one right off the bat, Expecially one that is not a TRUE relationship. You need to get to know yourself again and you can't do this with him hanging around you at work all the time. YOU have to be the big person in this and realize that it will not be the END of the WORLD if you two are not together. You deserve a real life. NOT one based on lies. You have to free yourself of this emotionally draining situation.