develop a thick skin

It’s weird bc I mostly don’t care what people think of me. I live my life in a way that I can respect myself. I might not be as far as I want to be, but I am doing good by myself (for the first time!) and that helps me sleep well at night. However, I am continually hurt by even offhand comments people make or small slights. Those things tend to hurt me more than when I get majorly f’d over. I guess bc I try my best to be polite and courteous. I always try so hard to make sure I don’t hurt anyone’s feelings in normal conversations, etc. It’s just hard for me to grasp that most people don’t think like that, or furthermore, might WANT to hurt someone else’s feelings. I’ve been through a lot in my life and even in the rough times, I never went out of my way to hurt anyone’s feelings…It’s just incomprehensible. HOWEVER, what does that even mean, “hurting someone’s feelings”? I need to start realizing that everyone is a big girl and a big boy and can handle life. I’m not personally responsible for everyone’s “feelings”. If I can do that, maybe I can also come to grips that no one but me is responsible for mine. So I should just get a grip, suck it up and let shit roll off my back. This is a tough goal but I think I’m gradually learning.