3rd Time's The Charm (Rock & Roll Curves #3)
D.H. Cameron

But when Tiff moves out and Booker becomes distant, Darcy feels lost, disillusioned and ready to give up. Things just get worse, however, when Darcy discovers Booker is cheating on her and has his sights set on Tiff. Darcy's world is falling apart but best friends, rock & roll dreams and true love are the foundations of something special. All Darcy has to do is believe in her dreams and herself.