Faith is substance of things hope for and evidence of not seen.
It is essential to have for a marriage. The evidence is how you treat each other.
Life is so busy with our to do list? Over time, you just take advantage of one another as if they always be there, so you don't have to put in the time or the effort. Are you taking care of that person's sprit? Are you feeding your spouse in this case your future spouse's soul with encouragement? Are you putting in the time?
If not, maybe you need more faith. From book, tape, or maybe counseling, put in deposit of faith in order to get stronger.