NEED ADVICE

One of my friends has this huge crush on this guy and has liked him for 3 years now but she's getting really annoying lately bc she keeps texting me and the rest of the girls in r group about what to say to him and what to text him but the thing is she's not even friends with him, they don't talk to each other in school and she texts him like they are bestirs but they really aren't.... And he know that she likes him but he has feelings for someone else and asked they girl he likes to a dance and then my friend got pissed and started yelling at him over text and she showed me it and from the way I read it it sounded threating and the whole group of girls and I have talked about wanting to tell her to chill and a few girls told her to leave him alone for awhile including me but all she does is ignore us and make up some other question to ask him and we r starting to get very annoyed of what to do and I just need some advice on what to do or to say to her so no one gets hurt or hurts themselves