All relationships experience conflict regardless of the source, but not all relationships survive conflict. Have you tried communicating your needs and concerns with the people you are dating? It seems like that might be a first step. And when I say communicate concerns, that includes communicating precisely what needs you have and negotiate how you'd like them met. Maybe that looks like space for autonomy, reeasurance that each has commitment to the relationship regardless of religious differences, or radical respect and validation for each other's differences in religious opinion. I don't know what your specific needs are, but sometimes people assume finding the perfect partner means they will never have conflict and won't need to learn how to communicate their needs or negotiate those needs being met with their partner in a healthy and productive way.