ADVICE! 😒

brianna
so I was in class the other day on my laptop just scrolling through Facebook minding my own business. I'm in a class with this girl I hate. she decided she wanted to throw popcorn at me even though in the class period I did nothing towards her whatsoever. I looked up at her she said stop giving me dirty looks (which I do give her looks but not that day) I said I can do what ever the fuck I want. she then said don't swear at me. I replied with I can do whatever the FUCK I want. she said square up😂 I replied with no that's for petty people. and so she called me petty. then I said no bitch look at you. you fucking threw popcorn at me. she also later told my boyfriend when I wasn't around saying "your girlfriends a bitch" like girl are you fucking 5!? 
I need advice I have a lot of stuff that goes on in my life and I don't necessarily have time for this. do I tell the school or just ignore her. 😒