Yeah, I can relate to what you are talking about. For me, depression is connected to anxiety and hopelessness about never belonging or being accepted. I never had confidence in myself or especially in my abilities to be socially competent. I've literally been afraid of people since experiences starting around kindergarten or first grade, including getting yelled at by the teacher when I didn't know I was doing anything wrong, getting bullied by other kids, and my parents actively encouraging fear and mistrust of other kids and generally most people. While there isn't a diagnostic category of "social ptsd," I can see where you're coming from. There is a proposed category of "complex ptsd," which could be a good fit for this complex of symptoms. Also, people with personality disorders tend to also have at least one or more axis I disorders such as depression and anxiety or some kind.

Ultimately, labels are just labels, although it can be validating to find a dx that feels like it is a good fit and explains you. Good treatment for depression, anxiety, or anything else should teach you how to address the specific situations, thoughts, and feelings that you struggle with, no matter what they are. When it goes deep, treatment needs to address where those thoughts/feelings/symptoms are coming from.

You might get something out of reading about Schema Therapy. It is a new therapy that I'm just learning about, which uses cognitive therapy techniques, but goes deeper and identifies clusters of negative or self-defeating beliefs that are learned in childhood and persist into adulthood. A lot of them have to do with social or connection issues. It was developed for treating personality disorders, but is appropriate for any related problems. Everyone has schemas - some to a greater or lesser degree than others.

http://www.davidbricker.com/clientsg...emaTherapy.pdf
http://www.schematherapy.com/id201.htm

There don't seem to be a lot of therapists practicing Schema Therapy, but it is easy to learn, so you can introduce it, especially if the therapist already uses cognitive therapy techniques. There is also a book, "Reinventing Your Life," which explains it well and is very readable.