Taylor Swift‘s ex-flame John Mayer has again spoken out about “Dear John,” Swift’s 2010 song about their relationship.

JOHN MAYER “DIDN’T DESERVE” LYRICS OF “DEAR JOHN”

The pair dated briefly in late 2009/early 2010 when she was 19 and he was 32 and, as Swift is (be it fairly or unfairly) known for writing songs about past boyfriends, her song “Dear John” was thought to be one from her failed relationship repertoire.

Even the guitar licks are reminiscent of Mayer’s distinct style, not to mention the lyrics, which could not be confused as being about anything but her relationship with Mayer. “Dear John, I see it all now that you’re gone / Don’t you think I was too young to be messed with? / The girl in the dress cried the whole way home / I should’ve known.”

Mayer spoke again on the matter in a new interview with Rolling Stone. “It made me feel terrible, because I didn’t deserve it. I’m pretty good at taking accountability now, and I never did anything to deserve that. It was a really lousy thing for her to do,” Mayer said“I will say as a songwriter that I think it’s kind of cheap songwriting. I know she’s the biggest thing in the world, and I’m not trying to sink anybody’s ship, but I think it’s abusing your talent to rub your hands together and go, ‘Wait till he gets a load of this!’ That’s bulls–t.”

Apparently the sting still hurts Mayer, as he sent out a passive-aggressive tweet on Swift’s birthday saying, “Tuesday, December 13 may be the lamest day of the year, conceptually.” The tweet has since been deleted.