Meaning of "You Had Me at Hello" by A Day To Remember

The lyrics of "You Had Me at Hello" by A Day To Remember explore the intense feelings of love and longing for someone. The narrator expresses their deep longing and desire to be with this person, going so far as to say they would see them die just to be with them before the daybreak. The speaker acknowledges that they had sworn never to trust anyone again, but the other person had such a captivating presence that all their doubts and reservations were shattered from the very beginning, symbolized by the line "You had me at hello." The lyrics also highlight the impact this person has on the narrator's life, with their smile being described as radiant and capable of lighting up a room. The use of "butterflies at the mailbox" as a metaphor suggests that even the smallest interactions, such as receiving a letter, are filled with excitement and anticipation when this person is involved. Ultimately, the song portrays the overwhelming power of love and attraction, and how it can overcome even the strongest of doubts and reservations.