<human>: Summarize the given text in a few sentences.

This couple had been together for about 6 years and would joke about getting married, but they never really meshed well together. The boy, Charles, broke up with his gf, Julia, about two months ago. Julia has no other friends than the ones in our group and is reluctant to make new ones. The people in my group never really knew her because she was so clingy, but are starting to like her more. 

The problem is that Charles is seeing another girl in the group and we all hang out together, which is something that Julia cannot handle at all. She becomes really rude to Charles and his new gf and acts sullen and won't talk to anyone. I've tried to be her friend through this, but she is super clingy and asks to see me just about every day. Is there anything I should do to help Julia or Charles? I'm getting really annoyed with her combative behaviour towards Charles and his gf, and Julia has started to ask that we not invite them when we go out. My friends and I want to stay neutral, but this is a lot of fighting.
<bot>: Long-term couple broke up, still hanging out in a group, but girl is fighting a lot with old bf and his new gf.