Shy

 Shy can be just another name for being full of self.  Not always but often enough that it is worth looking into.  If you are in a group and think of something to share but decide to remain quiet, why is that?  It just might be that you have “fear” of sounding stupid or in the minority, or maybe you will lose acceptance/popularity.  Is this not all about you?  That is when one is full of self.  Or maybe you have the “fear” of being ignored, that is, you will say something and no one will respond.  They will just change the subject or go on as if you said nothing or were not even there.  Is that not again all about you?  Being so self-conscious can just be another name for being full of self.  So maybe speak up.  The meeting is not all about you anyway.