You’ve been duped into thinking you can create a life without danger, one liberated from constraints and uncomfortable emotions, and that such a life is desirable. But you can’t, and it’s not. If you connect with someone and it comes with the risk of losing something, good. You’re alive!
Your milieu is not the same as your sister’s. It is an ever-shifting, individual configuration of information flows. The Twitter feed you have curated is a milieu. Your friend group (which is not the same as the friend groups of the other people in that group!) is a milieu.
It is by changing your milieu that you change yourself.