I have known a few couples where one is an atheist and (in most cases) the other a christian. None have lasted. I myself was in a relationship with someone that was raised to be an evangelical christian (apparently there are flavors) from Kansas. That relationship didn't work out. In fact, one of the reasons that was used to break up with me was... my views on religion and the church. That relationship coming to an end was probably best anyway.
So I beg the question........ Can an Atheist and any sort of Theist successfully coexist in a lasting and loving relationship?