Harry had looked away when Hermione kissed Ron, wanting to give them some kind of privacy. That's when he thought of Ginny. She was safe, she was perfectly safe and Hermione was right, it was over, Voldemort was dead. He had...nothing to worry about.
He looked back at Hermione and Ron when she beckoned him over to the bed. Harry wanted to believe that he had nothing to worry about, he honestly did, but there was so much that he still felt he needed to fix. So much.
Harry shook his head and slowly uncurled himself so he could get on the bed with them, moving close enough so that he could rest his head on Hermione's shoulder. He was more tired than he thought.