I was still lamenting the sorrow of separation when I suddenly felt that they had unexpectedly passed right by me.

The poet captures a bittersweet irony of longing: just as he is mourning the ache of separation, the beloved suddenly brushes right past him. It feels like a fleeting breeze that touches you before you can even catch your breath, let alone speak. This sudden proximity doesn't heal the pain; instead, it sharpens it, reminding us that someone passing by indifferently can feel far more distant than miles apart.