how to get outta trouble?

Hello, I am a 8th grader, who, earlier, jokingly did a pelvic thrust to someone i was friends with last year in the hallway, and he FREAKED OUT. he told me he was going to call the cops, and i said "call them and we can have a threesome" he told the teacher and i denied doing that. I went to the principals office right before school ended, i told the principal i had no clue what a threesome was because i was 12. i said the (very up-to-interpretation and light) pelvic thrust was me pulling up my truthfully very baggy pants up. He told me "he would get a cop over and anylize the footage" i asked if I could see it and he denied it. Please help me save my ass. Thanks