I went out to his cage this evening and he was still being aggressive with me. He lunged at me and I quickly pushed him away and closed the door. I told him he was very rude and he wasn't allowed to bite me again. He climbed up on the platform where his food dishes are and yelled "BAD BIRD" I said, yes you are, now be nice. After that, he pushed his head up against the door and let me scratch it. Progress, but I'm going to be very cautious with him and he probably won't go back to the store with me. I have to handle birds there and if he's going to be that jealous of me doing it, then it's an invitation for him to bite me again. If it's taken him this long to unpack his jealousy, then I wonder what other parts of his personality might start to manifest. I won't walk on eggshells around him, but I will certainly be cautious with him.