He likes you who are a bully. After you received his first gift he became more and more bold to give more gifts which your friends were clearly aware of. They think you like Jay because you keep receiving gifts from him.

You proved your dislike for Jay by throwing away one of his gifts and badmouthing Jay. Jay saw it all. He sneaks up and hugs you from behind. He even slipped one of his hands inside your uniform while his other hand touched your neck. He whispered. "I know what you want."