Loosing a friend is very hard. Perhaps, there is a posibility that you both talk again. I understand why you feel sad.
Not everybody can understand phychological issues until they live in their own skin or in their close people something similar.
I had a coworker who when she asked me about my depression, talked me that she never will live a depression. I told her: I really wish you won't.

The most inportant in therapy are not the labels doctors can give you, the most important is to know what are the issues you have to work in.