This is an interesting topic. I was always extremely outgoing before high school, I grew up in a very social environment was always playing outside with friends getting into trouble. I was even voted class clown in middle school!
Sometime in high school is when anxiety/depression kicked in. I failed a whole semester because I didnt want to go to school, I almost dropped out.
I am 22 now and I have battled my way back to semi-normalcy. I am at a large university, getting good grades, and holding down a job. But I still crave my old outgoing self. I could talk to anyone, anytime no excuses. I have thus far gone through this struggle on my own, my friends and family dont have a clue.