Breaking Cupid's Curse
Cindy Sutherland

It's the holiday he hates the most and it seems to hate him right back. After losing three boyfriends on that dreaded day, he's terrified that he'll end up alone before it's over. When his boyfriend starts acting strange, Charlie tries to give him the benefit of the doubt, but when he catches Beau in a couple of outright lies, it's easy to assume the worst and Charlie runs.
Good thing Beau runs after him!
Story also appears in the Conversation Hearts Anthology.