I’m so irritated right now!!!!!!!

There is this girl name Kim who is dating my bf friend that I GOT THEM TO DATE. I only know of this girl because of Instagram, she has been stalking me. She made her man pick up my man so they can drop her home, she started to question my bf about me asking a lot of my personal business and my life. This girl came at one of my other bf friends house and we all were hanging out, note that the girl and I have not seen each ever in person, she walked into the room with her man and starts saying that she is intimidated by me and I am scaring her, her man said to me “look it’s ur biggest fan”. Later on the night she then started to try to insult me on my hight like I don’t see why it’s is a big deal as I am only 5’0. Everything I do she tries to copy me and outdo which has me so irritated like it’s not even necessary tho. It reached the point where she did her whole room over literally identical to mine which has me in a total shock. My mother had to msg my bf to tell him that she doesn’t want me around this girl because we see that she’s trying to do every and anything to have my life. She started making me look bad in front my bf friends with lies who we hang with all the time and now everyone is believing her because she is new, nobody is taking me on and this girl is telling everyone lies about me making everyone not wanting to hang with me and my bf :(. This have been affecting me a lot to be honest because I was close to everyone and now I am not, what do I do next ? I have no idea what to do😭, everytime I try talking to our friends about it they yell at me and scream at me telling me “no” so this have me thinking that her man is prolly in the lie to because it would make it more believable as it is his friends, tbh he is literally doing everything she says because he is a boy that loves drama and is VERY jealous, I know that he is jealous because he told me and my bf already that he is jealous of our relationship and he wish he had one like ours, he told us this a year ago and he and the girl only got together a few months now. I NEED YOUR HELP, what should I do?!?!😭😭😭😭