This was too much for Jareth. His goblins arguing in one corner, the way that Sarah and Peter were hugging and touching and kissing and most of all ignoring him...all of it was far too much. He could deal with shouting, with discussion, but when they ignored him it made him feel as though he was shut out for good.
That thought was unacceptable, and therefore it could not be true. This--thing--that she had going with the human boy was temporary, and eventually, when he found the right way to convince her, when she realized what a dire mistake she had made, she would be his. Until then, she could sully herself with this human, she could fawn over him all she wanted. After all, hadn't the princess in the story had to lower herself to a place below that of a servant before she could see the truth that had been plain to everyone else? No, Sarah would come around, but Jareth couldn't bring himself to wait in her apartment for it to happen. He would come back later, when the irritating male was gone. Opening a window near him, the man turned into an owl and flew quickly from the room. Something inside of him ached as he flew away, as though the lightening had hit its marked and charred the very core of him, but he knew that wasn't the case.
Sarah had burned him to the core, and this time, he vowed, would be the last.