Your piano teacher made an extremely unprofessional comment. I suspect that on some level she was upset about being fired, so she made it your problem. A new teacher who is less judgemental might be better for you if you go back to it.

People without mental health issues cannot tell if you have "bigger issues," or if, as your teacher apparently assumed, you are just regular unmotivated. You really need a professional to tell you that. You have one, and your T wants to keep seeing you. I hope you go. That is how you will get through this.

You may not be ready for this, but someday it would be great if you told your T you've been holding things back to protect her. It is unlikely that she will judge you at all negatively for it, and helping you to understand why you do that could be really good for the T relationship. I know it's scary to open up; you might discuss that issue further in the psychotherapy forum if you wanted to. It is a busier forum.

As for quitting: I am an addict! I love quitting things. It's a relief before because you are getting rid of stress and worry about the activity. But if it's something you like then you feel terrible during (I'm losing this thing I like; why won't someone talk me out of this) and after (great I'm a quitter with nothing to look forward to). Those bad feelings are a sure sign that you should not have quit those things right now. As a quitting addict I can tell you that it doesn't have to be permanent. You can go right back in and un-quit most of those things. There might be a stray comment, but it will blow over.

It sounds like you're in a lot of pain and wonder why no one notices. I'm so sorry. It's such a hard place to be in. Sometimes people don't get it. I hope you can do what you need to do to take care of yourself. Hugs!