I don't understand.

Sometimes I feel like I'm a retard. I mean, I can figure out situations easily in my head. I already know what I wanna say and how to say it, and I can have my emotions under control. But somewhere along the lines of putting what's in my mind out there verbally, I mess up. I say things and they sound horribly, or they can easily be misinterpreted into something I never meant. I just turn out to be an asshole because I end up hurting people.
I hurt people I never want to see hurt, because I’m incapable of saying the right things when it matters most.