Last month we were all the same, complaining about the boss together at lunch. Now I'm the boss, and every conversation with them has a new stiffness to it. I have to give feedback to people who used to be my friends, and I can feel them recalculating who I am to them now.
More people experience this than they realize.
You got promoted over your old peers and now every interaction with them feels awkward.
If this sounds familiar, the Library can help you find the bigger picture.