Fortunately, in your case you can ignore her. I would try to gently confront her about it when you aren't quite so angry though. Tell her (as nicely as possible) that her maintaining a friend group and being annoying to people who aren't in it is irritating you. Chances are she will change what she does right away. Many do.
If she persists in doing this for weeks and months after you confront her, you may need to walk away from this friendship. I hope this doesn't come to that point, and the two of you can work this out and stay friends.
Miss_S momentarily lifts her fingertips away from the keyboard. It's late at night, and Miss_S really should be getting to bed. She congratulates herself on resisting two urges to be needlessly psychologically analytical tonight, and wonders if she really should be giving advice.
Miss_S hopes that Annaliese's conflict is not quite nearly severe as her own, and hopes that her own life situation is not clouding her judgement...