I’m in Family Sharing but I didn’t ever join. I’m.

It says I am in Family Sharing and sharing my location and messages in family sharing so I try to look at the Find My app location and to find out who else is Location put me in this…. Nnobody else’s location is there I can’t find anybody else in the group. It says other people in your family are not sharing location, how do I find out who is following my location? I’m feeling of privacy in stock. And Hacked of my personal information. AND off they found out my Apple ID password would that make any difference.?.?