Last year all kinds of drama broke loose when Ed called out Ellie for "cheating" on him, and banging the One Direction member, who was staying in the same hotel as them, instead. Actually the lyrics to "Don't" explain exactly what went down. Lets just say, Ed seemed pretty pissed off about the whole situation, and that's not the case now.
Recently speaking to The Sun Ed said, "I got over the anger the moment I wrote the song. It's a song that came at the time that I needed to write. That's the end of it. I'm grateful I could get a song out of it, to be honest. I don't feel it's about anyone any more, I'm not attached to that."
He concluded, "The moment you attach someone to a song it becomes more difficult to sing every night."
Good for you, Eddie. The last laugh is on them, anyway. The song is freaking awesome.