essay about pygmalian

Hello,
I need to find an essay I once read about Shaw's Pygmalian. I think it was an introduction to the play in a book, but I'm not sure. The writer argued that Shaw, in not making Eliza marry Higgins, was playing with the readers, who all want them to get together, but that this ploy (or experiment) backfires, because the narrative he conjures up is actually stronger than the author, in this respect, and readers sense that something is wrong. So that it doesn't entirely work. Does anyone know what I'm talking about? I really want to re-read the essay, but don't know where to look. Thank you all very much!