Script-writing - Stairwell Scene

For this scene, one of the characters is explaining how her ex-boyfriend wants to get back together with her whilst the other friend is explaining how she will only get hurt again. This scene will be one of the more emotional scenes in the film which means that their dialogue will have to convey sadness, confusion and even anger. Similarly to the other scenes, I want their lines to have a realistic feel so I will have to write the scene very carefully.