I'm just saying that by just pretending that you are confident, you are not by definition confident. If you force yourself to come across confident to others (and potentially yourself), while your reality tells you that you're uncomfortable and not confident, it becomes denial. An act if you will.
In this case ''Being confident'' and ''Pretending that you're confident'' aren't the same, as
the person that is pretending to be confident is still feeling anxious and uncomfortable. As such, it only applies to how people see him/her. Confidence only works when it is endorsed by your own reality. Which, can be altered by your attitude, like I said before.
What I'm trying to say (in a way, WAY too long post
) is that you can't fool yourself. You can however change how you perceive things over time.