i need some 팬팝 ppl help!!

ok, so this past week me and friend were in a fight bcuz in the hall it was really noisy and i said something to a frined that to her sounded like "Your hair is ugly" 또는 something like that. So like the 일 after we made up this really nosy girl name Sarah came up to me and said "Oh my god u did not have to make fun of Cidnee's hair!" (my 프렌즈 name is Cidnee's) and one its none of her busniss and 2 were not fighting anymore!! then she told me this a 3 days later but still acted like my friend, just blaming me!! confusing i know! what should i do about Sarah!!??? HELP!!