Ahh, that's good to hear :)
Faith is intended more as this definition - complete trust or confidence in someone or something.
"this restores one's faith in politicians"
synonyms: trust, belief, confidence, conviction, credence, reliance, dependence; More
antonyms: mistrust
We've had a really rocky couple of years (outside factors, not our relationship) and we've always said we just need to have faith in eachother and our relationship and we'll get through it, so it's for that, rather than the religion definition :)