At my university we have a very large but tight group of friends and I live at the house where the parties always are. With the group being so large certain people get invited every time like my ex and the guy she cheated on me with. Is it wrong for me to ask them to stop inviting her? They think nothing of it but she was over last night (without bf) and she stayed all night even though it was just myself, my roommate, and two other chicks who claimed to "be on my side" and hate her more than even I do (which is probably just overly empathetic bullshit) when this actually happened.

I just sucked it up all night while we played drinking games and smoked weed together but I just don't want her at my fucking house. Am I caring too much or what?