You promised to go to the homecoming dance with Cheryl, even if she went with Polly or not. When Polly had a 'sugar crash', Cheryl depended on you to be there for her. When she saw you walking in with Archie and Veronica then going to talk to Mrs Cooper, she broke down in betrayal.

•••

"Cheryl, wait!" You ran after her.

"No, (Y/N), just like Polly, you left me high and dry after walking in with your goons. I depended on you and you betrayed me"

"I know, Cheryl, and I'm so sorry. I just had to do one thing before I came tonight"

"Well, you could've told me first" she started walking out the school.

"Cheryl!"