I suffer from this as well. I think it all comes down to a spotty childhood, but that is for another time lol
I had a match were one of the RO's wife was giving me a real hard time. Screwed my whole match performance up. I get hung up on what people say/think about me. I don't really know why but if I could get over it, my quality of life would improve X3. I've found staying in a joking attitude and not taking anything serious even when others are helps. I don't think this helps at all, but atleast your not alone in other people screwing your performance up!