Chase, Samantha. Shaughnessy brothers

"Falling in love with your best friend? Easy. Telling them how you really feel? Impossible. Quinn Shaughnessy believes there's a lot more to life than romance, and he always thought his best friend Anna agreed. But now she's coming out of her shell and dating...and Quinn starts seeing her in a very different light. Anna can tell Quinn anything, except the big secret she's been hiding for years-- that she's fallen in love with him. Now Anna is determined to make a life for herself that doesn't include hopeless pining. But just as she's ready to move on, Quinn seems determined not to let go-and the way he's looking at her might be enough to finally change them from best friends to best everything"--Amazon.com