Singer John Mayer expressed his disappointment and said that he was humiliated in his ex Taylor Swift's song Dear John.

John Mayer said that the young country singer and former love interest wrote the song for him.

"I was really caught off-guard, and it really humiliated me at a time when I'd already been dressed down. I mean, how would you feel if, at the lowest you've ever been, someone kicked you even lower?" Mayer explained when he first heard Taylor's song.

In his interview with Rolling Stone magazine, John Mayer said "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."

John Mayer declined to go in further detail of the song's meaning. He just answered that the lyrics do not hold truth on the real status of their previous relationship.

Taylor Swift was still in her teens when she dated the much older singer in 2009. However, in the song, Taylor wrote, "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. Don't you think nineteen's too young to be played by your dark, twisted games, When I loved you so."

Mayer claimed that he was blindsided as he was unaware of her feelings toward him. "I never got an email. I never got a phone call," Mayer said.

Mayer's full interview will be published in the upcoming issue of Rolling Stones, which will hit the newsstands today.

Watch the video of the lyrics of Taylor Swift's new song "Dear John" below.