Rooney spent the whole walk back to college tapping away on her phone. I didn’t know who she was messaging, but when we got to our room, she quickly changed into a nicer outfit and I knew she was going out.

‘Don’t,’ I said, just as she reached the door, and she stopped, and turned round to face me.

‘You know what I’ve learnt?’ she said. ‘Love ruins everything.’

I didn’t agree, but I didn’t know how to argue with a statement like that. So she left and I just said nothing. And when I walked towards my bed, I found the photo of Mermaid-hair Beth on the floor again, partially crumpled like Rooney had ripped it off the wall.