I remember this in school. I remember kids seemed snotty with me and unfriendly but yet wrote something great in my yearbook and said the opposite in their message. I was very confused. To this day I still don't get it. I also remember there was this girl on my softball team in my freshman year and she seemed snotty towards me and then friendly and then she graduated and after that I would sometimes run into her at places and she was never once a snot towards me again. My mom said some people grow up and are nicer. I have known some kids who were the opposite unfortunately.
It's one thing to have a bad day and be stressed out so they snap than just changing personality out of the blue being all wishy washy.
_________________
Son: Diagnosed w/anxiety and ADHD. Also academic delayed and ASD lv 1.
Daughter: NT, no diagnoses. Possibly OCD. Is very private about herself.