I want to quit social media but at the same time I cant/dont want to

Why does everyone share so much about their life on facebook especially to people we havent seen or talked to in years? I always get a bad feeling after I post things, like whose stalking me, whose being nosy, hating on me, etc. You never can tell ehat people tuely think.. but you get so caught up in sharing because everyone else does it & you want to too.. I love sharing with my family, and its a great way for them to see photos of the family and things, I have also tried setting it to only certain people can see and trying to keep my “friends list” to the minimum bit still never know who you can trust.. I just dont get social media but I also cant stay away from it…

does anyone have any advice?