Why do we care?

I've caught myself a few times trying to say that "I don't care what people say about me." But, lets be real. I think we all have a part of us that truly cares about what others think. Obviously some care more than others, but for me, I care just enough. Sometimes, too much but I don't show it like others do. For example, lets say someone is mad at me. I try so hard to be like "whatever, I don't even care." When in reality, inside, all I can think of is what I did wrong or what I can do to fix whatever I did. My PRIDE is what gets in the way. It's such a terrible thing to let your pride control you sometimes because you become THAT person that won't apologize when you know you did something wrong. Plenty of times I've been in arguments that aren't even my fault, yet end up saying sorry because it's too stupid of an argument to let last. BUT there are some arguments that I feel are truly not my fault and I shouldn't have to say sorry for something I didn't do. Right? I know I'm not alone when I say that. But, sometimes we have to stop caring about our pride and think about whether some friendships are really worth losing or breaking because of an argument. Some friendships don't last, that's a fact, BUT there are some friendships that are meant to be held together but it takes a lot of growing up and maturity to allow it to grow. So, if you ever hear me say that "I don't care what people think", don't believe me, because I honestly do. I care enough to do whatever I have to do to fix it, if it's important enough to me to be fixed.