Here are your supplies

Draw your heart

Draw the shadow outline

Draw the rest of the wing and then the two little "horns" on top

Draw the "mustaches" on the "horns" and the the other pretty designs right by the wings...don't forget the circles

Draw the bottom part of the heart

Outline in sharpie the parts I did

Darken the areas around the shadow outline and where I have done also

Now shade the other parts