There is nothing in your power that you can do to get the part. So when you hinge the success of an audition on whether or not you book the job, you are only setting yourself up for failure.
When you leave an audition, ask yourself this one simple question: Is the Casting Director a fan of mine? If your answer is yes, then your audition was a success! Every time you leave an audition you will have done one of three things, made a fan, kept a fan, or lost a fan. If you have made or kept a fan, you have succeeded. If you lost a fan, you have failed.
See, whether you make or lose a fan, is entirely within your control. Showing up on time, being professional, being friendly, having your material prepared, and giving a great performance are all within your control. If you do these things well, you’ve held up your side of the bargain. The casting director will be a fan. On the other hand, if you’re late, you’re wasting their time. If you have a bad headshot or sloppy resume, you look unprofessional. If your material isn’t prepared, it will look like you don’t care about the work. If you don’t give a good performance, you’re either incapable or lazy, and either one is not acceptable. You can be quite sure you’ve lost a fan and losing a fan hurts bad. Not only did you not get this part you also lost the opportunity to audition for that casting director on future projects.