Waiting
There are two types of waiting. There's the waiting you do for something you know is coming, sooner or later; like waiting for the 6:17pm train, or the school bus, or a party where a certain somebody might be. And then there's the waiting for something you don't know is coming. You don't even what it is exactly, but you're hoping for it. You're imagining and living your life for it. That's the kind of waiting that makes a fist in your heart.