You're living in a fantasy world, honeypie. Here in reality, people (even married people, who tell their partners they love each other! OMFG!shock) cheat on each other, and they get divorced all the time. Marriage has become a meaningless formality.
I think people should wait until they've found a long-term partner, but I don't believe in marriage.
And yes, people who fool themselves into believing they are Christian DO do that.