If this were a clichè love story, Sam's argument with her best friend (who's a guy) would be unimportant, and they would of made up ages ago. He wouldn't have to work for her forgiveness, it'd just happen. They'd have been in love forever, and only just realized. But this isn't that story. Sam can't even look him in the eye after the incident, let alone forgive him. This isn't a clichè love story. This is Sam's love story, and she's just not good enough for a true clichè.