Flirting with Friends (The Flirting #5)
Stella Wilkinson

Patty is wary of Michael's motives, and so she keeps him firmly inside the friend zone. But when the two of them team up to separate another couple, the sparks begin flying in all the wrong directions.
A return to Compass Court Boarding School and lots of your favorite characters.
Books in this series:
The Flirting Games
More Flirting Games
Further Flirting Games
The Flirting Games Trilogy, Books 1 - 3
Good @ Games
Flirting with Friends