Hi Alexxis,
I too have over 20 years in the profession. It does not even phase me now to enter the class, but it is something that truly came about with time. I make it a point to learn all of my student names before they leave for the period, and I also make it a point to greet all of my students. Comfortableness eases anxiety with everyone. Make it a point to get to know your students.
Patricia