All housecats think people are their mom. That's really the only fully understandable social relationship that cats have.
Some cats have friends, but stable friendships seem rare in my experience. My older tom gets very twitchy when the younger cat stays out late. Sometimes he goes out looking for him. Then he beats him up.
For years, my Mom's neighbor had a cat and and old dog that would pal around all day, mostly the cat following the dog. Go figure!