They can have a successful relationship, but I'm not sure how they could get to a married state. My boyfriend is Christian and I am not religious and he says that he would want our marriage vows to include the mention of "god" and if we had kids, they would have to be baptized. I do not agree with religion and do not want to baptize my kids or have any mention of any sort of god in my marriage vows. My relationship with my boyfriend is amazing and stable, but I don't see it ending at the altar. We can definitely make our time spent together work forever, but there will be no wedding rings or children then. Some people say I'm stubborn for not giving in, but I say that people can get baptized at any age and join whatever religion they wish when they feel comfortable.