Sean Mendes' new song won't last long after the public split.

Sean Mendes is processing his split from singer Camilla Cabello with his new single "When You're Gone."

Mendes called the song up-tempo therapy, saying that it "represents the essence of the breakup process and what it is, and the memories and all those feelings start to flow."

She added, "I think after the breakup, I realized how protected I was by this person and that I had to be able to save that part of me. And that was a big moment, and I don't think you saw that vulnerability that was a vulnerability that was a big deal. You must guard and love until they are revealed.

The song's hook includes the lyrics, "It's hard for me to let you go; I'm just trying to hold you back." When asked if he was behaving well, Mendes said, "No, I'm not holding back."

Mendes and Cabello announced the end of their nearly three-year relationship on Instagram in November 2021.

While releasing music has always been upsetting for the 23-year-old, he said he's glad fans are referring to the song released Thursday by Island Records, part of Universal Music Group (UMG.US).

In June, Mendes will embark on his 86 Wonder: The World Tour in Portland, Oregon. The Canadian says touring is a creative life force that feeds the part of him that can make music and be artistic, which he shows in his music video for When You're Gone.

"I just wanted to like it and let it go out there so it could be like 'guys, that's it.' You know it's been a minute.