Love into hate. I need some advice

hey whats up well anyhow I have a ex girlfriend who keeps bothering me and insulting me. I wanna just ignore her but I have too many friends involved in this poor drama. I just asked someone out but they said theyll give their response later. I dont know if I should tell my friends upstraight if she says yes because they might think Im trying to get rid of my emotions for my ex girlfriend and totally using her. then I dont know whether to tell my good friend, I want too but he's been so mad at me lately.Dont know what to do need some advice. Right now Ive kinda isolated myself from the group trying to let things die down. But the fire is still great. Will I add to it or what.

also about my ex what do I do she doesnt care of me in fact she hates me but wont leave me be. How do I get her off.shes nice and if I insult her Ill just add to the flames.