

I don’t understand your question.
If you are romantically involved, you won’t mind religion. If you mind religion, you won’t get romantically involved.
Never heard of a situation where someone says I fell in love with a person despite absolutely not wanting to accept their religion or religiousness. Seems ridiculous.
Well, that means at some point you either accept their religion and keep being romantically involved, or you can’t accept their religion and stop being romantically involved. It might be a temporary situation as you described, but nothing that can last in that scenario long term.