Age 15 -- I received my first real valentines ("real" meaning from a boy and not just because he's handing them out to the entire 3rd grade class). Brett and Nathan, two of my best friends in my mid-teens, both gave me valentines. Brett gave me one of those little boxes of chocolates. Nathan left an anonymous (the secret came out later) candy heart that said "Pretty Eyes," which started a series of inside jokes culminating in "Pretty Eyes" being painted on some bleachers at a combined-stake service project (don't worry, he was supposed to be painting them). Those two boys did more for my self-confidence that whole year than I could ever thank them for.
Age 19 -- Freshman year of college. My first boyfriend had broken up with me a month and a half earlier, and I figured Valentine's Day would just be depressing. Then Mandi informed me that Valentine's Day was amazing and that she would be my Valentine, because it was one of her favorite holidays. We swapped Valentine's goodies, and I learned that the Dollar Tree sells roses in February. Thank goodness for friends!
Age 20 -- Sophomore year. My roommate's boyfriend had left town to prepare for his mission, but he sent me a letter with money and asked me to buy her some roses and chocolate and set them up in a pretty way. I did an awesome job, if I do say so myself... This was also the year I was secretly wishing that Cooley would surprise me by deciding he liked me and sending me a Valentine. That was stupid, though; I knew he only saw me as a friend. I didn't get the Valentine, but 15 days later we were engaged.
This list, of course, leaves out the years where I wished the Grinch would switch from Christmas and steal Valentine's Day. But hey, it's my blog, and I can be selective with my memories if I want.