I think people that want to get married are more thinking about themselves rather than the other person.
They arent considering they have to be prepared to give up the rest of their lives and body for the other person. Often they are fantasising about what the other person can do for them...thats what I found. Like a house, picket fence, babies, or cooking meals or someone to hold their hands.
Not saying anything wrong with thinking about those things but they arent really thinking about what God wants to do in their lives, or who they can reach.