What a great song this is. I love the half-hearted pretence of, “Oh, I’m totally fine with being dumped.” And the music reflects that so well. It does its best to avoid minor-key gloominess but can’t raise the tempo above a crawl and is drenched in melancholy, ambiguous chords.
I’d recommend following Dean and just doing simple down strums all the way though.
Here’s the little fingerpicked intro: