I found it when I was in highschool. I was sick and tired of people always asking what was wrong and why I went so quiet (I've just gotten diagnosed bipolar 2... so I do go through phases where I am actually confident and extraverted and more naturally social). And I had a lot of pressure at home about being smart and respectful and responsible and basically to be "normal".

So I started actively working on things and worked even harder after I had OD'd when I was 15. I just wanted to fit in and be left alone. I find hiding in plain site is a lot more effective than being a wallflower, because no one notices you when you act the same as they do. My motivation I guess was trying to beat depression and trying to prove to myself/my family that I wasn't a worthless piece of s***.

Haven't really succeeded in that, but I do find social interaction a LOT more easy and actually enjoy some of it sometimes. The things that I've worked at anyway. I still sort of flip out if I'm in the wrong mood or participating in something that is newer to me.