If there are still things you want and need to talk about, tell her. If both your heart and mind said this was the time to end it, then I think perhaps it would be time.....but in your heart, I think you feel and know there are needs left. In your mind it seems you're thinking your T must be thinking it's time for you to go, so you should go.....but maybe your assumption of her thoughts may not really be what her thoughts actually are.
I think perhaps you should tell your T what you're thinking she's thinking, and see what she really is thinking. She needs to know that and she needs to know what you are really feeling are your needs.