Slipping Away – Moby
As Ron and Hermione's lips locked onto each others, Harry felt a huge sense of loss. If they all survived the battle – he cringed, that was a horrible 'if'- and this relationship bloomed, surely logic said he was going to end up without his best friends. He remembered how distant he and Ron had been when he was going out with Lavender, remembered how far away he had felt when he saw Ron looking at her with lovey-dovey eyes. He didn't want that again, obviously. He felt a huge surge of bitterness at the thought, and it was with this bitterness that he cried "Oi!" Harry felt strangely satisfied when they immediately broke apart.