i'm not sure if this really helps, but i take group lessons which kinda peak my confidence cause not only am i being taught but i'm playing alongside randoms i don't know, plus i play infront of random flatmates friends and stuff (i haven been playin long btw). maybe thinkin your the **** works as well :).

i guess the onli other thing is really get into the mood of the song and kinda phase the ppl out but i mean thats easier said then done.