I also have the same problem. During everyday life I’m fine. But when it’s time to hang out socially I just can’t do it. It may be an introvert issue, but I know exactly what I want to say but just can’t get it out. I kinda predetermine in my head that I’m gonna botch the words I’m about to say so I end up just not talking at all which in turn always just makes me look like a typical quiet fly on the wall, which I know I’m not cause I have a lot to say and talk about but just can’t get it out. Extremely frustrating