I need help and advice.(repost) plz read?

Ok well this is like repost but watever. My bf is bein rlly annoying. I told him i was sick and wasnt going to school tomorow and he put this look on his face and walked away. After homeroom i c him with one of my bestfriends so i went to talk to someone and he walks over and starts messing with me and im like wtf i dont feel good go away. Everytime i say something he takes it as a joke and idk wat to do anymore. I need ur help and advice.PLZZZ