That's tough. None of my partners have been more than slightly religious. I think it's important you each respect the other's position, but every relationship and person is different. I would need to know more details before I could offer much more.

Try to be accepting. Try not to talk about it often. I think if you get to outspoken, you may blow up the relationship.

My husband and I are of opposing beliefs I am a Christian who clings to pagan philosphy and he is a seventh day Adventist he hates my graven God's and sacred rituals but so long as we don't look down on the other for their beliefs and accept them as part of the person everything doesn't need to change

I was married to a woman in 1972, smart, very attractive, homebody. By 1973 she had gotten involved in new Born-again church in the area. The kind where they speak in tongues and lay down and have fits in the isles. I was a long haul truck driver so I just stayed away until 79 when a got a run that kept me near home then we got divorced. There is no compromise you can make with this mentality unless you are willing to join them. Quit now and enjoy life.

MichaelSpinler is correct. I have been in a long term relationship with a devout catholic, and it requires that the atheist not say anything that affronts the other's beliefs, otherwise it inevitably ends the relationship, which is unlikely to last anyway.

How religious is your partner? I think someone who is really laid back about faith and takes it less seriously is workable, but when religion is important to one and lack of religion is important to the other, there's a rift in values and that can be increasingly difficult to bridge. Even a casual believer can, in the long run, become especially devout, and if that happens you may find yourself on the receiving end of animosity, resentment, and continuous proselytizing and conversion attempts. Good luck to you and your partner.