What about “regret”?

“I remember once when I was young, and I was coming back from some place, a movie or something. I was on the subway and there was a girl sitting across from me and she was wearing this dress that was bottoned queer up right to here, she was the most beautiful thing I’ve ever seen. And I was shy then, so when she would look at me I would look away, then afterwards when I would look back she would look away. Then I got to where I was gonna get off, and got off, the doors closed, and as the train was pulling away she looked right at me and gave me the most incredible smile. It was awful, I wanted to tear the doors open. And I went back every night, same time, for two weeks, but she never showed up. That was 30 years ago and I don’t think that theres a day that goes by that I don’t think about her, I don’t want that to happen again. Just one dance?” – from “Indecent Proposal”