10-13-2017, 08:40 PM
Nick was never jealous of Juliette's powers. He only wanted old Juliette back, not the crazy, unhinged, vengeful, murderous Hexenette. In the scene where she reveals herself to him, her dialogue makes it seem she had been envious of him and now she had powers and felt she was now just as special as she thinks Nick felt about himself being a grimm. She is the one that doesn't want to go back to normal and boring because all this power was getting to her head.