From Wikipedia, The Catholic Church, also known as the Roman Catholic Church, is the world's largest Christian church, with more than one billion members worldwide. Your strange metric for what it means to be a Christian.
That is extremely cynical. While some people have problems, many people have happy and successful marriages. Many of those who have divorces have had divorces before. If your that worried, get a prenup. There's nothing wrong with making a commitment to someone you love.