At first I couldn't remember what the book was called. All that I could remember was that a girl taught her brother's friend to be cool to ask out a popular girl to prom. The scene I had remembered was of them throwing a basketball back and forth to help him talk to girls without being so nervous. I had also remembered her wearing a pink dress to a party and having a feeling similar to the Never Been Kissed prom dress. Honestly, it's nothing like that in the book but it just reminded me of it.
Anyways, this is a short read, but I loved going back to my teenage self with this one.