Request #123

I think this is an older book… but I’m not sure.
It follows a teenage girl and her friend that’s a boy. There is an audition for a play and one (or both of them?) get parts in the play.
One day the boy goes to pick up the girl but gets in a car accident and dies. At the end she doesn’t go to the funeral and swings on a swing. Help!  Suggestion from Lost Classics reader Julie: Say Goodnight Gracie by Julie Reece Deaver