Marriage is one of those "someday" things for me. Nope, it has little to do with kids, since I'm planning on adopting, anyway. If I never get married, I know I'll have a great life. If I do, I'm sure it'll be great in a different way.
I don't believe there's "only one person" for me, as there may be any number who could share a happy life with me. That's where discernment and wise council are important. Besides... I wouldn't want to think that if I decide not to marry that person who was earmarked for me, then that person is doomed and can never find another enjoyable, healthy relationship. Or that once I'm in a committed relationship with a person who's awesome for me and vice versa, I could leave just because I think someone else is "the one". Some decisions I think are meant to be binding (except in extreme circumstances).
In short, "a match made in Heaven" is hogwash, but "a match kept together by Heaven" isn't too far off.
Q: How many poets does it take to change a light bulb? A: 1001...one to change the bulb, 1000 to say it's already been done.