Shot design and access, my man.

In this scene, it feels like they are drifting apart, but you keep them mostly in OTSes or Two shots. I feel like this works at first but really makes the scene fall flat when their argument progresses and they drift apart into singles.

Also, really allow the scene to breath and take your time with these moments. I want to hold my breath before he says "I don't love you". It should be tense, so it will hold our attention- and because it is held out, it feels ever more painful and powerful when he says it. Another note: It starts really quickly. Ease us into the scene and give us a character to hold onto slightly, so we can experience it through them. To me, it seems like this is the girl's scene. The emotional weight is on her and she makes the decision to wake him up and what not, but I'd like to see that.

Now for camera:

It is just a simple thing- don't lock down your camera. Loosen up your pan and tilt, so you can follow the actors to keep your framing.

Work with your actors. It'll help them, even if they don't have an acting background, to have a clear idea of the dramatics and ups and downs of the scene. Break down the scene with them beat by beat and their performances will typically be stronger because of this.

Where are you at school and what year are you? This is pretty good overall- I liked the viciousness of the boy.