It's rude to skip a friend's birthday celebration.
Layne gets asked out on a date by her longtime crush Evan, on the same night of her friend Tori's birthday bash.
Layne wants to hang out with Evan.
Layne invites Evan to Tori's birthday party.
Layne goes on the date with Evan, skipping Tori's party.
Tori is happy for Layne, and they all have a great time.
Tori is hurt that Layne chose a guy over her on her birthday.