I will not tell your whereabouts even to my own heart, because if even a single person finds out your address, everyone will come to know it.

Here, the poet takes the secrecy of love to a delightful and dramatic extreme. He refuses to trust even his own heart with the beloved's whereabouts, knowing well that the heart is far too emotional to keep such a sweet secret safe. There is a tender, protective fear that if even a single soul finds out—even his own heart—the news will inevitably spill over and the entire world will come to know.