When you wanna fight someone would you wait for them to agree or just do it

When I was younger this one girl from school would text me telling me off, wanting to fight because she was mad at me and the next day at school she waited outside my class for me when it was over. She would yell at me and I walked right passed her, she’ll text me things like “you better step up” trying to get me mad and fight her, I also find it weird because I didn’t give her my number but she got it from someone else. She didn’t do this to only me she had a reputation at the school for fighting. She also would say it to about 3 other people meanwhile none of us spoke to her.