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Katy Perry, John Mayer, Grammys

Larry Busacca/Getty Images for Sony Music Entertainment

Katy Perry and John Mayer are officially dunzo (again).

After briefly rekindling their romance recently, the on-again pair have officially broken up for a second time, a source tells E! News.

According to the insider, Mayer has been telling friends that they are "over for good." Their latest breakup was not caused by Perry's touring, but rather a "lack of emotional interest on his end." Or to be more blunt, Mayer is telling pals he "fell out of love with Perry but will always love her," the source adds.

Back in January, the exes sparked rumors of a reconciliation when they were spotted at dinner together at a friend's house in L.A. The 37-year-old hunk and the 30-year-old singer were all smiles during the party.

Katy Perry, John Mayer

Walter Blanco/AKM-GSI

Shortly after their initial sighting, Mayer and Perry had dinner again at Sunset Tower and then traveled to Chateau Marmont where they enjoyed drinks with a few friends, including Allison Williams. "They seemed very comfortable together and kissed several times," a source told E! News at the time. "It was a cold night and they held hands and John pulled her in close when she got cold."

A source also told us, "They never stopped talking and being friendly while they were broken up. They are really excited about being together right now and spending as much time as possible."

Mayer and Perry first broke up back in February 2014.