Gracey, I'm sorry you are struggling right now. I do understand. It's a tough thing to learn : self-care. With PTSD we are generally so reactive... and really unable to be consoling someone else. You are not responsible for that friend's actions, nor to be her rescuer. Back away, make apologies and back away. It is perfectly ok! AND your doing that will show her by example something she maybe also needs to learn.

TC breathe... do self care...