(((Chestnut)))
Hang on. Someone will be here soon with an answer.
I am a teacher. I know I am required by law to report if I am aware of an intent to harm the self or another. Or if a student is in danger.
I am not sure about the therapist.
But, Chestnut, why WOULDN"T you tell your therapist? Clearly you go to him/her for help. There is nothing worth harming yourself over. You ARE a beautiful child of G*D; you deserve all that is good...
Shalom!