Maybe having expectations of other people is a sign you have expectations of yourself. If I hold myself up to a standard of the type of person I want to be, it's fair to hold other people up to expectations of the type of person I want to be around.
Make sense a lot! I always set a standard for myself and if I fail to match that level it makes me feel weird. Same goes with people around me.
I agree those standards we set for ourselves can make us feel bad. Better to have them though.