#39: The Friend Zone
While kissing or hugging your date at the night's end is customary, a high five can signify being put in the friend zone. It's not a romantic gesture and conveys that you're not interested in a romantic relationship.
This could be how the night went for one girl who expected more from her date. However, a high five made it clear that he only wanted to be friends. It may not be the outcome she hoped for, but there needs to be clarity about his intentions.