Suckerpunch - I completely understand where you are coming from. I agree that there is a difference between being friendly and being friends. I think that you can be amazing co-parents and act friendly towards one another without being great friends. I know that in my situation, the OW is the reason why I cannot be friends with my H. Even if I wanted to be friends, it is not possible. H cannot talk to me openly about work and his activities because they often involve the OW. My H's job is the biggest thing in his entire life. So if I cant be involved in the biggest thing in his life, than I am not really friends with him. Everything is simply superficial. Maybe it will change in the future, but I am not sure if OW remains in the picture.