I believe in making them, not finding them.
This is the best answer I have ever heard to the question.
I think with the amount of people on earth, the odds are decent that there's someone out there better suited to you than the one you're with. But the real beauty of it all, I think, is that if you do it right and work at it then it doesn't matter because you don't want anyone other than the one you're with.
So I agree- they're made, not found. It's a choice, not fate.
Aaaand that's enough sentimentality out of me for one day.