Franki
Your t is amazing, I am so glad that you are being courageous and making the decision to go see t again. You don't know for sure that this will be your last appt with her so please try not to dwell on that until you know for sure. I hope it will not be your last but from what you have said before I can see why t feels she can't help you as much as you need right now.
When you say you are taking some frustration out on yourself, does this mean you are self harming or drinking again?
I think that its great that you can continue with your psychology classes, its noice to have something to work towards and to have a plan when things are falling apart. Your feelings on sui do sound situational and that is actually good news, believe it or not because it means that they won't always be there and that once you start feeling better they will begin to evaporate.
i do hope you set up your first appt for the dbt group as I think it can only help you, just being with people will help. You deserve to be happy