Am I shallow?

There’s this guy, he’s nice, funny and really good looking. And he likes me. No reason I should be apprehensive when it comes to hanging out with him, right? Well, I am. My problem is this: Junior prom is coming up and I want to go with a date. I would like to go with him. Except, the only thing I’m concerned about is height. I know, I shouldn’t care about it, but I do. He’s only a little bit taller than me and I want to wear heals to the dance. I’m concerned that I’ll be towering over him if we go together. Is it shallow of me to care about that and how do I get over it?