I find it unsettling he has keys to my apartment.
*edit* I called him to let him know I was watching my friends cat for a couple days and that I didn't randomly get a pet. He then told me I was the best tenant he had and how nice I am, and kind, and honest. How it's hard to find a nice girl like me anymore. Then he asked me to have dinner some night. He also was hinting that I should spend Christmas day with him.
*edit* My roommate just moved out a couple day ago also so now he knows I live alone.