That could be because you keep spacing out and not staying present. It's hard to come up with a plan and help you learn coping skills if you aren't "there" in your sessions.

You are super impulsive and in danger if your SH sessions are going on as you describe them - 6 hours does not bode well for your own safety. One day free of self harm doesn't show safety yet.

Saying you'd rather be dead than go back into the hospital also is not a sign of being safe on your own. If you really do not want to go back to the hospital, you are going to have to fight for yourself here. I'm not saying it is easy, but as someone who has had to fight that fight over and over again in my life, I DO know it is possible even when you are feeling this bad. The one difference is that I am willing to accept the help and safety of the hospital when I know I am unsafe; making that decision IS fighting for myself. Your unwillingness to go into the hospital and your saying you'd rather die than do so may be exactly what will land you there involuntarily.

So what ARE you going to do to fight for yourself so you don't end up needing to be hospitalized? You are right in one respect; your T can't save you. This is YOUR fight to fight here. If you won't fight for you, you will leave the decisions in the hands of your T and your school to keep you safe.