Yah, I lived in my room and nowhere else.  As I grew older the only time I'd leave would be to go get some drugs.  I wouldn't be comfortable out in the world though, and I'd head back home as quickly as possible.  My father sat, and slept, on the couch... and never left.  Despite not having a curfew, I'd sneak out of my window to avoid him if I had to go anywhere.  It didn't matter if it was midnight or the middle of the day.  I didn't even wanna come out to go to the restroom.  Thinking about it today, I didn't really how much shame and embarrassment I had about all that.  Between my mother and father, they completely destroyed any confidence or sense of self I could have developed.  I grew up and went to school and didn't interact with my peers like everybody else.  I didn't just have low self esteem, I had ZERO esteem.  Can you have less than that?  I could not interact with people because I just didn't feel I was good enough.  That was long ago, but gosh... I was messed up.  I think I may have been turning into an avoidant personality at that stage.  I wanted to be a part of everything, I wanted friends and people in my life, to be cool, and popular.  But my esteem would have none of that.  
I used to think I developed better self esteem and gained my confidence, but I'm not so sure anymore.  I think I just made a science out of ignoring it and its all in there somewhere still waiting for me to face it.  Maybe I just stopped feeling bad about it and accepted myself the way I was.  I'm probably over confident now, but my self esteem and self is trashed very badly.  I'm glad to know it, though, cuz I can fix that.  
One of the weird things I realized is that... with my ex... I got brainwashed pretty badly.  I still can't decide if I feel she did it intentionally or not.  but I came to the conclusion I let it happen.  I even helped.  I told myself I was a failure, and bad, and not good enough, and spent a great deal of time brainwashing myself.  In a weird way, I think I'm my own worst enemy.  They may have started it, but I kept it going.  I'm doing my best to treat myself better =)