Well, when I meant my husband, I was walking with indifference to whether or not soul mates existed. I didn't know, and stopped preoccupying myself with finding someone. I actually started to prepare my heart for lifetime chastity, as I went back to school. I really wasn't expecting what happened.
And honestly, I don't KNOW if soul mates is entirely a myth or not... however, I do understand why some people advocate the theory. When you fall in love with someone, and in such sync with that person, it's hard to even imagine that you weren't meant to be, somehow. When you laugh every day, share the same sentiments, affect each others' mood in positive ways, and deeply understand what most people don't understand because you both went through it - it's like, how could this be a coincidence?
I find it curious about some Christians talking about "God's plan for their life" and yet stating there is no soul-mate, and by that I mean someone predestined or fashioned to fit that person in a way no one, or few other people, do/would. Long time couples, that have a "total marriage," are reported to die in very close proximity of time. One passes, and despite age or health, the other soon follows.
I understand liberty and free will, but if you pray for God's plan, isn't that essentially praying for the ideal, or what is predestined? I know that's opening a whole new can of worms, but I see little difference between the two schools of thought, other than one "just happens" and the other happens if you follow God.