Grannyknot....clue is in your OP.....you are watching a 'movie'....if only life was that simple or decisive.....
As I get older and just a teeny bit wiser I realise that its what you put into a relationship that really matters. Yes your initial 'choosing' mechanism help...going for a decent person with a similar set of core values but if you are a loving, forgiving person who tries to live by the rules you set each other...then I think you will probably have as much chance as anyone who feels ( whether in life or in a work of fiction) that he/she was the love of their life.