I'm back to not believing in it anymore after some experience with almost getting married. The engagement failed, and I got back with a different ex I had intentions to eventually marry, who that ended up backstabbing me anyway. I tried to change my heart on marriage at the time to "be a good Christian," but I have come to the conclusion my initial instincts were right, and that marriage and certain types of relationships are not for me. Which is fine. I think this was all for my higher best, even though it hurts sometimes. I saw my parents divorce and was subject to much abuse I do not want to re-experience.
Now I am having more spiritual evolution, and I am more focused on seeing that unravel in a way that will lead to more fulfilling relationships and a better life in general. I don't think my personal path involves marriage. Perhaps some people need to experience it, and some don't. Every person's path is their own.