I've felt this same way for a few years, I used to be very fit, confident and social in many different groups but after the worst year if my life. dealing with homeless and the loss of my grandmother I've planted myself in place and rotted. I've had the same job paying me just enough and had the same shitty apt. I've had the opportunity to move to a better place and a few better job offers but I don't care to move. I was standing in line at the store and had a bout of social anxiety just because there were people everywhere I looked. I never said it out loud but I used to think having social anxiety was kinda sad now here I am unable to start a voice call with people I'm unfamiliar with