i even have expectations towards acquaintances. i expect them to be friendly and mature and not spastically erratic, at least towards me and my beloveds. i have my own set of rules of engagement regarding any level of acquaintance: i won't give you all of my craziness, i will never be mean to you, i will politely exit your life without a harsh confrontation (unless you are a considerable asshole, and even then, i am trying to be as nice as possible to everyone who deserves it), and i will have my own opinions of you but never hold them against you; i accept you in totality.
a failed hipster once told me that the cliche about your twenty's being about balance wasn't all that wrong. a shitty relationship or twenty are all acceptable. move on, grow up, create new rules like making expectations known.