In my opinion, family can include people you are not related to! I have friends who I am so close with we feel related. Also, when someone has a girlfriend or boyfriend, technically, they aren’t related by their genes but they feel related. Some families also include a dog which isn’t an actual family member but is considered one.
When I was in a movie theater, there was a trailer for a movie called A Dog’s Purpose. The movie is about a dog who dies a bunch and reincarnates as a new dog every time. The dog is originally part a family who cared for him and loved him like one of their own. This is a good example of my point. Also, I read a book a couple years ago called Brixton Brothers and even though it was called Brixton Brothers the two main characters were just best friends not family.