Quoting from Definitely Maybe, when Will Hayes talks with April.

Will : you see, i don't want a fling. i want the real deal.
April: forget about the real deal. you don't find it, it finds you.
Will : what does that mean? i don't know what that means.
April: it means that you get to a certain age and then you're ready. you know, you're ready for kids or commitment or you know, a mortgage, you know what i mean? and the person that you are with then becomes the one.
Will : so you're saying it's not who, it's when?
April: exactly.

When i told this to my friend, he said, " told ya, you're not ready yet. and there no such thing as The One. It doesn't exist"

Love,
Szasa