I find it really lame that this article includes a long list of "fails" instead of successful examples.
Slightly more seriously, the format of a confession is pretty basic ("I like you, wanna hang?") and the article does include several canonical versions. But at the end of day it's just confirming that the attraction is mutual, and most of the fails are about randos totally failing this part.
That's half the point of the article, that the culture is to follow that one clear format to avoid ambiguity, and that other formats are seen as creepy, privacy-invading, etc.