I have a song that follows me around. Every couple of years, ‘I Can’t Make You Love Me’ finds me, like someone seeking forgiveness. The intro comes on the radio, the sound of the piano trickles like rain against a building, and I know that it’s come back again. It’s strange, because the song’s not attached to a particular sadness, to a particular break-up. In fact, it feels like a bit of an asshole. Like…