I can play the National Anthem solo in front of thousands and not break a sweat. The larger the crowd the better I feel. Put me in a more intimate setting or with an ensemble and I go crazy with anxiety. It really hurts my playing. I am not nearly as good at playing once the nerves kick in. It is very frustrating to work at improving as much as I do just to have it undone by anxiety at performance time. I practice to improve technique as well as to work on material for the different ensembles that I play in. I have got to figure this out. Not sure how. One would think that it would go away with more exposure to performing with groups. That has not been the case. Being around certain people or places makes it worse. I even stopped studying with one teacher due the anxiety felt when it came time to play for him. I just want to have fun at performance time.