How old are you? Age did it for me. I was incredibly shy as a child, terrified of public interaction, telephones, whatever as a teen.....then in my early 20s I permanently stopped giving a fuck. I'm 29 now and my give-a-fuck meter in my brain is seriously busted so bad that it's gone in the opposite direction and I really ought to give a fuck about some situations and don't and something horrify strangers in my lackadaisical reaction to a lot of things...or something. LOL
Not that I don't have days of anxiety, still dealing with PTSD issues, but the generalized anxiety, social phobia stuff is long gone with age and maturing.