Do it movie style:
Please don't blame her to live within her fantasy world. She grew up reading Twilight, Mills & Boons, Pride and Prejudice; she is not asking you to be a vampire, or a prince, the least she is expecting is that you go down on one knee and pop her ‘the' question.
Make the moment really happen, the one she had been reading all these years. And she will adore you for making her dreams come true.
