Body language, actuoly, counts for 70 % of communication. If your you're not feeling good, it manifests itself in the body language. It's going to be very clear that you're not confident if you're allowing those things to control your er manners.
745. Mental Factors in Learning English (with Ray Addam) [English with Ray SwapCast]
Talking to English teacher Ray Addam from Glasgow in Scotland about mental factors in learning English, such as anxiety, confidence, stress and motivation. Video version available on YouTube.