for every person that marries "The One", there are 5 that felt that way until she(or even he) got dumped by that one. Not that i'm not saying it can't happen on the first try, but that experience ...

And I think the last and only true 'One' was Eve, cuz she was created specifically for Adam, and we see how well that turned out. So i think since then there has been no true one. Oh except maybe...