Hi there, I know exactly what you mean. I actually have been confused if I am just a self conscience person, or could this feeling possibly be related to my OCD? Like you, I have great friends and I really do not care what people think, yet at the same time I find myself obsessing over what I said to someone or how I said it, or what they think of me. Or like if I see someone looking at me I think they are judging me as well, or I think oh why bother talking to those people, they would not want to talk to me. I really understand how you feel, and it is frustrating because you feel like as an individual you really are not that insecure, but you still can't stop obsessing over it. I cannot tell you how to stop it because I have yet to figure that out, but I thought you would find comfort in the fact that you are not the only one to feel this way. Best wishes to you.