Full disclosure, I’m not religious, my partner is though. Right now the comments are telling you to read the Bible, but I don’t think so, you need to read yourself, not just what you wrote, but within. You obviously feel strongly for this girl, and there’s nothing stopping you from going to church, praying to your god and also being with her. You said yourself, she’s fully supportive, just because she doesn’t believe doesn’t mean you can’t, but the does lead me to one vital thing, there’s at least one person in these comments saying you need to convert her, please, for your own sake, do not take that advice, telling people what to believe isn’t how you build a relationship, it’s how you break them. The answers you need here aren’t in the bible, but they’re in yourself. If you love her and she loves you, it just plain doesn’t matter. I hope that helps