Since boundary crossing is an issue for you, and for many people, it seems to me that sharing too much of oneself with someone who is not ready to hear it can be intruding on their boundaries.

I understand your addiction to your former T. I had something similar with my first T and read a very old book How to Break Your Addiction to a Person that really helped me understand why I got so attached to people and idolized them despite them not really knowing me. Perhaps you could just say something about addiction and unhealthy relationships instead of giving all of the details.