My Secret Crush on a Customer

I know I shouldn't have, but it happened. Every time I saw him walk through the door, my heart skipped a beat and my palms would sweat. We worked out once that he was in his twenties and I'm twenty-five myself. He's tall, dark hair, kind eyes, just the type of guy who can make you feel like melting into the floor when he walks by. One day, while serving him coffee, we ended up talking for longer than usual about travel plans. Something clicked between us that day, and I felt a connection form as he laughed at my joke about how bad I am at planning trips. But then reality hit me: he was just another customer to him, not someone who could ever actually see me in any light but the barista one. So here's what I did next: when he came back again later that week, I wore something a bit more daring under my uniform and made sure to lean over so he'd get an idea of how much his visits stirred up inside of me. He noticed, and there was this moment where our eyes met, just for a second, before we both pretended it never happened. I need some advice now: How do I make the first move without freaking him out or losing my job? What should be my next step in turning this secret crush into something more real?