I used to live with a roommate and she had three cats of her own that my cat was with. I recently moved out on my own and my cat is now the only one. Within the last few weeks, he has become more and more agressive towards me, such as chasing me and biting my legs when I walk, attacking my feet, and scratching my hand when I go to pet him. I have a bunch of toys for him and do my best to play with him everyday when I get home from work, but this has not seemed to help. Any suggestions to help ease this transition or to at least minimize the agressivness during it would be greatly appreciated.