My best friend, Michael, is alone at home this weekend so he has decided to make a party. He has created an event on facebook so that he can invite who he wants to. I was very surprise when I saw my ex-girlfriends's name on the guest list. Michael knows perfectly well how she treated me when we were together. She was horrible to me. I can't understand why he invited her. I really don't know what to do. I don't wanna go there if she is there! Should I talk to Michael about that?

Blair, 15, Oklahoma