In the end, Professor McGonagall conjured a large fan out of thin air, which she gave to Ernie with instructions to waft Nearly Headless Nick up the stairs.
Instead, create a grand story about why they would never like you, based on nothing, so you can live in a world where you can never have what you want.
Not necessarily, but I think when you're in love, the detail that you get in the song is just, you can't, nobody can make that up in their imagination.