Was my friend Amber a demon?

No she's not a demon. more in likely she wasn't anything your mom thought her to be. the thing is alot of people get afraid of things they don't understand. and your friend Amber was probably one of the few that do witch craft as you call it. if anything she might of been using you in a spell. NO SPELL IS MEANT TO HURT PEOPLE its ageist any Wicca or Satanic law to do anything to anyone that will harm them. Your mom just freaked out because Ring around the Rosie is a rhyme made up to tell people of the Black Pleag. Don't worry your friend was no Demon a Witch mayby but Demon HELL NO