Relationship advice for a teenager w a partner who has religious trauma anyone?

Well Mr and my lover have been dating for almost a year now and everything seemed perfect; I was agnostic, they were atheist. But then,as you can guess, I converted, tho my faith only became stronger after I'd met my first test of faith (when my Muslim mom found out and threw my cross in the garbage). Now about my partner, they have religious trauma so their association w that stuff was pretty bad, and that was what caused our first major argument. Now I'm on the verge of breaking up with them because I've fallen into a depressive episode so religion has been my anchor more than ever and its what made me realize that I don't belong to this world and that the world sucks. Yesterday I was talking abt God and how much I love Him in a gc and they saw the messages and we argued again. Ik I just not talk abt it in front of them but I literally can't stop. I've tried but I keep getting carried away and I don't think it's a bad thing to talk about Christ but I don't wanna hurt then more than I already did. Should I dump them? Or should I stay and try to fix things with them? If so, how?