Funny version: "Will you fall in love with the person you created? You may not, but I fell in love. I coveted his body, no, he coveted my body, maybe both. In the end, I "died" and stayed in a different world forever, while he "lived". This is unscientific! But we are still happy together."
Serious version: He fell in love with a string of codes in the program, and was eventually judged to be systematically brain dead, leaving him in a different world forever!
Concept: Geniuses deserve love