Off the top of my head, she says thank you for solving the conflict and says/implies that you've impressed her, for a human, and earned some respect. You profess your undying love, which she politely rejects. You ask if there is any way to prove your love. She concedes that elf/human courtship is not unheard of, despite the differences in life spans, and says a challenging quest could earn the right to court her. You blather on about true love, and ask what the quest is. She describes a family heirloom (necklace) lost hundreds of years ago and asks you to find it, giving you a picture for identification. You bring the picture to the dwarven jeweler, who creates a duplicate. You then bring the fake necklace to your true love and lie through your teeth, telling her you searched the countryside extensively and finally found the heirloom. She is very grateful, agrees to let you court her, and you get to kiss her a couple times through speech options. Someone brings up the remaining threat to the world, and you leave to take care of that, promising to return when done.
I'd think this behaviour would disqualify you from being the Divine One, but I guess with two Marked Ones dead, the world is not too picky about a little betrayal.