The song "Heaven" by Niall Horan is about falling in love, and the feeling of being in the presence of someone so special that it feels like being in heaven. The lyrics describe being in a deep connection with someone, and the chorus suggests that even if the love they share gets complicated, heaven will still be the same. The song also speaks to the idea of never wanting to lose the feeling of being in love, and wishing this connection could last and never end. In the end, the song emphasizes the idea that true love can be so intense that it literally feels like heaven.