"Crazy" is a song performed by Engelbert Humperdinck, which was released in 1962. The song tells the story of a person who is deeply in love but feeling lonely and blue because of their unrequited love. They are aware that their love interest may eventually leave them for someone else, but they are unable to overcome their emotions. The lyrics reflect the protagonist's self-doubt and questioning. They wonder why they constantly worry and what they did wrong to be in this situation. Despite knowing that their love may not be enough to keep the person by their side, they continue to love and try for their affection. Overall, the song portrays a person who is infatuated with someone and is willing to endure the pain, uncertainty, and emotional rollercoaster that comes with it. Their love is described as "crazy" due to the intensity, irrationality, and desperation they feel for the other person, even though they know it might not be reciprocated indefinitely.