You personally don't believe in Valentine's Day. Thinking the real reason it exists is to increase the profit of card and flower companies. To you, the holiday is meaningless. Many would say you're just sour you have nobody to spend it with. But that's not the case. No, no, you have a valid reason as to why you dislike Valentines Day. But your perception of the romantic day is changed when you (quite literally) bump into a ditzy classmate.
*Yeah it's a day late, oh well. Hope you enjoy it nevertheless.