He has know of Y/N for over 3 years, watching Y/N dream in the dreaming and watching Y/N during the waking world day, his love for you increased every moment he sees you, never making himself know to Y/N until one evening Morpheus see Y/N getting attack, injured and on the brink of fading away, he knows where Y/N lives and takes you there as he knows it’s safe, and can can treat your wounds, and slowly regain your strength, as well as understand what’s happening