I have major issues with a girl from school..?

so i used to be friends with this from school, but now we are not. we got into a fight at school like a physical one.. i started it.. and i won, by alot. so we have a court date and everything, and we also have a cl together at school. and during one of them she was talking loud enough for me to hear (i'm pretty sure she wanted to me to hear her) saying once school is out, i'm fu*ked and that she is going to trash my house and everything. and i know what i did was wrong when i started the fight i know that was insanely wrong of me to do, i never get in trouble until that day, but i really just want it all to be over. is there anything i can do to make sure she stays away from my house and family? i mean i get it if she wants to get back at me, but it's not my house she will be messing up, it will be my parents and they don't deserve to have to go through that. i mean i can't call the police because of course she would just say that she didn't she say anything since i can't prove it. can i bring this up in court? and they can do something about it? idk what to do helpp mee. ohh yeah and i'm 17 if that makes a difference for anything..