Acting more confidently begins with thinking more confidently.
Your brain is a very powerful organ, it sends messages to your body, and those messages are relayed to other people through your body language i.e. how you walk, sit, stand, your facial expressions and eye contact etc. Therefore, if you think that your point of view is useless and that nobody will be interested in listening to you, if you feel afraid, or you see yourself as inferior then this will be relayed to other people through your body language and, because those are the signals they are receiving, they in turn will view you in exactly that light. It is a vicious circle that you need to break and one which you can break.
If you can learn to think more highly of yourself then others will think more highly of you.
