Yes people certainly can care about others who are not family. I care for several people who I am not related to, close friends for example.

I have coworkers who are also my friends outside of with sgch as I see them outside of work hours, and I have coworkers who I am on very friendly terms but don’t see them outside of work. I have a coworker who i talk on the phone on occasion and we wouldn’t mind seeing each other in free time but time and distance makes it hard. So it all depends. There are variety of relationships in the world. Some are hard to define

I have to add that family members are not always blood related. Familial bonds aren’t always due to blood relation.