Marry someone you like. Not just someone you love. Like is actually more important and much more powerful than love. Like is what makes a relationship withstand the test of time. Do you like being with the person, just hanging out doing nothing?
Perhaps it's not accurate to use the phrase "falling out of love" as the title of this post. It's more that we fall out of infatuation so that the work of learning about what it really means to be in love can begin.