my relationship with introversion

let me ask you this. when you open the door for a girl or when you smile at an old lady why do you do it?

I do it but when I do I don't feel anything at all I just do it because I know I should

I don't know why I do alot of things

I just do 

maybe because I cant handle change or maybe because I don't feel the need to change

maybe I'm fine at the bottom

I can do anything a normal person can, I can crack jokes, smile, and conversate to a degree but it gets tiring because no matter how much I get caught up in character I know deep down its not who I truly am

and for now I'll keep it that way because I'm certain that within 5 minutes of talking to me you'd get confused as to what the fuck is in front of you

if I do overstay my welcome and push through it when my social battery is at zero I start to get headaches, I get really pissed off at everything, and then after I'm done what ever I'm doing I push away and isolate tenfold the amount of overtime I spent

and remember to answer the question. is it genuine empathy, a sense of justice, to uphold your image, whatever man, why do you do what you do?