Everyone thinks they know who I am - ditzy Sarah, who cares more about appearances than she does about anything real. And yeah, I do care about what people think of me.

Take my friends Alex and Rachel. We all go to Strandbrook College, Dublin. We're supposed to be best friends. But Alex and Rachel - they're really close. They tell each other things that they would never tell me. I try not to mind.

And then there's Simon. He's my sort-of boyfriend but we hardly see each other. And when we do, I feel like he doesn't really 'see' me, you know?

Everything's such a mess right now. My dad left us to be with Her; my mum is really angry all the time; and my brother Louis, he just doesn't care.

I guess that's why the shoplifting started. It makes me feel good. In control.

I just want everything to change. And it does. The day I got caught . . .