Big Crush No. 8 (Girls of Canby Hall)

"The fall term looks promising, with a new guy on campus. Dana, Faith, and Shelley find that they have yet another thing in common- they all have a crush on the new guy. What's worse, Michael isn't from the prep school down the road; he's Canaby Hall's new guidance counselor, and he's too old for anyone at school. Or is he? Dana can tell that someone has captured Michael's interes, but she's sure she can win him over. Then she realizes that Michael's romance is with one of the best friends Dana ever had." This is from the back cover of the book.