I believe in two things 1) soul mates exist 2) you make someone your soul mate. Life is pretty unpredictable and things do change.I believe if you love someone enough they become your soulmate. I don't believe it's always like they show in the movies, you glance across the room and wow love at first site. For some people it's been true but for most you have to "try" a little.
Good Luck man, I think i might have found mine.