It was very rare that Dennis was by himself. Even more rare that he was by himself in a tree. He'd just wanted a little time to think. Not because he was upset, but he just needed to clear his head. It had been so focused on snogging and Jimmy that he needed to get outside and clear his head before classes.
Dennis hadn't really thought about other people until he heard someone climbing the tree. He paused, glancing down and adjusting his school bag. He didn't want anything to accidentally fall. Part of him wondered if he shouldn't make sure that someone else knew he was there.
After a moment of hesitation, Dennis cleared his throat. "Hi. I don't mean to startle you, but...I didn't want to keep silent and then startle you because of that either."