In the final volume of the fresh and funny Girls Quartet, Ellie's best friends do the unthinkable--bond without her--until the girls realize how to really be friends. Ellie knows the rule: Best friends always come before boys. But Russell isn't just any old boy. He and Ellie are in love. They're going to go out forever and ever ... at least, that's what she thinks until everything goes wrong. Now Ellie feels like crying all the time and--to make matters worse--she can't even count on Magda and Nadine anymore! The three of them were supposed to be inseparable. They couldn't really be splitting up for good. Could they?