Take a piece of pink paper and cut it into a heart shape, write the name of the person you want to dream about on the back of the paper, clip the paper in your hand before you go to sleep, cover yourself with a quilt or a sheet, read in your heart that you want to dream about her, and then put the paper on a pillow low and clap your hands for 6 times. Go to sleep when you're done and the chance of dreaming about her is 83.9999%.
Check your surroundings repeatedly during the day to make sure you're not dreaming. Get up 5 hours after going to sleep and emphasize to yourself over and over again in your mind that you want to dream about the person you're dreaming about, and fall asleep again after you're done emphasizing. Imagine yourself in a lucid dream, dreaming about the person you want to dream about, and tell yourself, "The next time I dream, I will be able to dream about the person I want to dream about".