The Sweetheart Game by Cheryl Ann Smith

Jason knows how to get right to the point, "a blank stare followed the pronouncement. “So you don’t want to get naked with me?” I liked the chemistry between Jason and Summer:
                 “I hear they have a chocolate decadence cupcake that will literally kill you from happiness.”
                  “Order something else then. You promised me sex later.”                     She frowned. It had no bite. “You are such a guy.”
                  “And I wear my testosterone cloak proudly.”
I really loved this book, and I loved how Jason took Summer's crazy with pride and devotion.