You liked Gyutaro. Not just that but loved him. You're a mere human and he's an Upper Rank 6 demon. How could you love him? They're man eating demons! And not to mention he's been living for 100 years or so! And he's really ugly (I don't mean that)! Well.. I suppose you've confessed to him, his reaction:

"WHAT!? YOU CAN'T POSSIBLY LOVE ME!! I'M HIDEOUS, AND A UPPER RANK DEMON!"