60% of all human communication is non-verbal. Sometimes body language, 30% is your tone, so that means that 90% of what you are saying ain’t coming out of you. Sometimes happen that you start feeling bad about someone and will eventually conclude that the person is not worth talking. what makes you to do that?
You are unaware of the fact that it is the body language of the speaker, because it speaks the fact not audible. your body language shapes who you are.
Always open yourselves, you must have the habit of sitting with arms and leg crossed, but do you know what message it gives others, it shows that you are least interested in talking to others even if you dont have any thought like that. if you want others to approach you than make yourself approachable.