The same here. I think the only that saved me was my job and then, my guy. They connect me to the world in some way.
My problem didn't begin in childhood, at least, I wasn't conscious. It was in late adolescence that I began to develop this tendency to avoid social situations and being involved in normal activities most people did.
I felt and feel inadecuated to interact and do things with others. So on up to now.
If I go out of my comfort zone then, I have to recharge my energies. I can open myself up very few people.

Regarding the diagnosis, I think it's important to have an accurate one. You need to know what you are dealing with to find some kind of progress but I went through my first diagnoses after having therapy for years and even when I didn't know what I had, it made a difference this therapy. In other way, I didn't dare to get many things I got.

The first diagnosis I received was a released for me at those moments. Now, I'm not so optimist because the progress is slight and I'm afraid I will have this for all my life.