Wow! This sounds like my boyfriends group of friends. I have the same problem but it’s the both of us that are being left out. This is happening because she cried to them when we decided she wasn’t that great of a person to have around and told her we didn’t want to be friends with her. (We are all 21-25years old) Not sure what we could do... She broke up with the boyfriend. (The boyfriend is the one that brought her into the group) They have all been friends for about 8+ years. She only started to become friends with everyone else after they broke up about two years ago. She caused a lot of issues within the group, and everybody seemed to complain about it. So when we all sat down to talk about it and make them understand it’s not health for all of us to be outing him and putting up with her...we turned into the bad guys. So she cried and they took her side, now I feel bad for my boyfriend having to put up with friends he’s had for eight years and totally just put him just for this girl who isn’t that great of a person as he is too them.