I’m new to this forum. My cockatiel is nearly 2 years old, I’ve had him since march 2019 and we’ve been closely bonded ever since. I recently moved into a new apartment with a new roomate and started a new job all at once & since then he’s become a nightmare. I believe he’s developed severe separation anxiety. Any time I start to move around and do chores in my home he flips out and starts flying in circles until he’s panting. Occasionally when i try to pick him up he flies away (again flying in circles) and/or bites me. He hates going back in his cage although i put his favorite treats in there for him. When i try to pet him he hisses at me as if he is scared that i’ll grab him. He refuses to accept treats from my hand as a reward for good behavior (this has always been the case), and usually i would pet him as a reward but that wont work now either. These fits of anger/anxiety happen once or twice pretty much every day and they can last for quite a long time before my cockatiel likes me again. My roomate says he only acts like this when im around so i am sure i am the problem somehow. Any suggestions?