Though we can love our traditions, of dresses, suits and rings, the marriage happens long before in the quiet moments of these star-united lovers.
Their marriage was written in their eyes the first day they met, not a thing of human-kind nor laws, yet existed as if the universe had brought together two souls that were already betrothed.
A marriage is a deep and loving friendship, one in which the love is so strong that each would sacrifice for the other, one that sex gets added to. So the only way to a lasting and happy marriage is via friendship. So take it slow, get to know the other person fully, be best friends.... and save the sex for marriage... because when you do that you'll find that humans mate for life and it is a sure way to a joyful way of living. The alternative is exposing yourself to the risks of sexually transmitted disease as potential partners "try you out" in non-committal ways. This is because you didn't take the time to be best friends first... that you got addicted to sexual contact... which is awesome in a marriage between best friends and terrible when trust and surety is absent. So abstaining until you meet "the one" is by far the sexiest thing you can do... better for the health of your body and brain.
A real marriage is not a thing of externality - not of family, religion nor finance - yet a bond between two souls that has a reality only the two of them can see. For we cannot truly become aware of this sixth sense until our soul-partner arrives.