I never had a valentine on Valentine's Day while at school. It was painful. Many high school teenagers dread Valentine's Day, this lovely day, a source of colorful cards, class parties, and candy. A teen without a valentine has that feeling he/she is the only one who is not walking hand-in-hand with an adoring boyfriend or girlfriend.
Valentine's Day is an opportunity for parents to show teenagers how to celebrate this lovable day even without a valentine. Host a Single for a Purpose Party. Have your teenage son/daughter invite friends who are not dating or involved in a relationship.
Have games for individual or group participation, so the teenagers can enjoy the party without the pressure of needing to be paired as couples. A good example would be to have a questions/answers game, where participants can answer such questions as "What is your favorite candy?" and "What is the strangest Valentine's Day stories you have heard?"