I don't care if they make you taller than me, I like you in heals!! Is that so wrong?

Everygirl I date always gets nervous around me because of my height. Most girls I date are somewhere between 5'4" and 5'6". I'm about 5'7", so if they wear heals they're taller than me. I personally don't mind a girl in heals, but the last one changed shoes atleast 3 different times. Any ideas on how to make her feel more comfortable?