Hi there, I think if you trust in your therapist, then you can inform them. Because it's their profession and responsibility to help you relieve the issue, their relationship with you isn't like your parents, and I believe they have their methods to analyze the cause and solution. Do try and open up to them to get a better understanding of yourself!
Of course, going to a mental hospital is a really extreme option, but I don't think it would apply to you. You can look up the common symptoms of the patients in the hospital and it's usually very serious, especially with people that are out of control.
(think of it as the joker for example, criminal, personality etc.)
Wish you the best though :D hope u get better