A therapist told me "She doesn't respect your boundaries. The simplest boundary is your door. The second is your phone. It doesn't matter if it was a neighbor or a friend, if you aren't available, you don't have to answer either."

Another told me "You will reach a point where you can see the disorder without stepping into it. The first step is maintaining distance and a barrier to prevent that from happening."

I remembered both those things in that instance.