Why my " friends" keep playing these games?

Ok so now y'all read the group chat and you see my so called "friend" mel is starting shit and I ain't got time for it now me and my SO have been dating for 4 months and now I know he wouldn't cheat on me so now Mel and her manz roromone*( I don't care how fucking spell his name) but she is jumping to conclusions about my relationship she needs to stay in her relationship... cause now I'm questioning my relationship with my manz??? Help I don't know how get her out of my life. Edit: So if you can't follow the chat then don't help me I don't have time for more negatively* in my situation.