Good for you for doing the right thing!

In most people's lives there comes a point when they realize that there are people who just aren't worth being around. They are trouble. They cause pain. They cause upset and distress wherever they go.

Frankly, some of these people may have real problems...but you can't solve them.

Part of being an adult is to be able to recognize who these people are and avoid them.

Sounds to be like you've recognized Cassie for what she is and that it's time to move on to people who can be real friends.

Tell Kelly, Stacey and Grace that and ask them to do the same.