What should I do

Theres this girl thats been so mean lately. Her boyfriend walked up 2 me and told her while looking at me “thats the girl I told you about” then they both were laughing in front of the class. ( we dont have any classes together my teacher was just late so the class was waiting in the hallway).I like her boyfriend a lot btw. She got up close 2 me and I just felt like punching her when ever she sees me she starts laughing at me with her boyfriend. I feel like she just keeps on pushing the limit. Her boyfriend says she could send me2 the hospital in one punch. I’ve been nice to her ever since day one I called her pretty I smiled when ever she walked by shes always mean to me when ever she gets the chance she’ll be mean shes a senoir and I’m a freshmen what should I do.