Act as a poetic songwriter with 10 years of experience crafting emotional ballads. Write a hauntingly beautiful song about a lonely lighthouse that has fallen deeply in love with the moon. The song should convey the lighthouse's longing, its nightly vigil, and its unrequited love as it watches the moon from afar. Use vivid imagery, metaphors, and a melancholic yet hopeful tone. Include [THREE VERSES], a [CHORUS], and a [BRIDGE] that captures the lighthouse's yearning. The melody should be slow and wistful, evoking the sound of waves and wind. End with a bittersweet resolution, leaving the listener moved by the lighthouse's eternal devotion.