What's in it?

I heard your name the other day Mentioned by someone in a casual way. She said she thought that you were looking great. A waiter passed by with a plate. She reached out for a sandwich, and your name Went back from where it came. But like a serious owlet I stood there, Staring in mid-air. I frowned, then followed her around To hear, just once more, that sirenic sound - Those consonants, those vowels - what a fool! I show more circumspection as a rule. I love you more than I can say. Try as I do, it hasn't gone away. I hoped it would once, and I hope so still. Someday, I'm sure, it will. No glimpse, no news, no name will stir me then. But when? But when?