Trying to get the name of a book I read in the late 1960’s or early 1970.s.. It was a paperback – might have been purchased through the school. It is about a girl that lives next to a boy. They were friends when younger but as they got older, she became more popular. They are now in high school and he works a lot on his car and they don’t talk. Something happened and she needs to fake a boyfriend. She convinces him to be her fake boyfriend, but he falls for her. They get together and go to prom. Very sweet book. I think it may have “something borrowed” or so in the title. Would appreciate any help.