Question

One of my very first posts was about relationships and how I actually truly suck at most relationships that I have, whether personal, friends, family, or even random people on the street. And I think I know why that is, I never know what my responses should be when random things arise. Whether actions are good, bad or indifferent for some reason, I can never figure out what the right words to say, right actions to do, right anything to do for that matter. 

So I am not the best and I know that, so here I ask, and beg the question. How do people know the answers to responding to actions and all that jazz? If you know you should totally inform me!