'if u r not e one'

Recently i am hooked to this song 'if u r not e one' by david bedingfield. it is really a nice song with gd lyrics. u should go n listen to this song n u will know wat i mean.
In this song, there is one part which i like e most, 'if u r not meant for me, then why do my heart tells me tat i am?' n ' i hope tat u r e one who i die with'.
But how do we know if the guy is really e one for us?
By feelings or sixth sense of wat?
How do we know tat he is my prince charming or just a cheater who will cheat my feelings?
Sometime i feel tat love is a complicated subject to take! it really need a lot of love, concern, attention n time, but through e learning process, u will learn alot of things which will make u grow up. :)