Breakups stink, whether you're a world-famous DJ and the planet's most recognized pop star or just a couple of crazy kids from Iowa who just can't make it work. But especially if you're the former.

So after keeping things relatively chill for the past few months following his very public break from Taylor Swift, DJ/producer Calvin Harris offers a slight peek behind the celebrity-relationship curtain in the new issue of GQ U.K.

Calvin Harris Says It's 'Hurtful' That Taylor Swift's Team is 'Trying to Make Me Look Bad'

"When it ended, all hell broke loose," he said of the pair's June split, adding that he regrets some of his tweets following the breakup. "Now I see that Twitter thing as a result of me succumbing to pressure. It took me a minute to realise that none of that matters. I'm a positive guy."

Indeed, Harris' uncharacteristically bitter Twitter spree -- in which he lashed out at Swift's team for confirming that she co-wrote Harris' summer smash with Rihanna, "This Is What You Came For," under a pseudonym -- was surprising in its naked display of heartbreak. "I figure if you're happy in your new relationship you should focus on that instead of trying to tear your ex bf down," the Scottish DJ tweeted on July 13 in reference to Swift and then-boyfriend Tom Hiddleston; it was reported this week that Swift has split with the Thor actor.

Taylor Swift & Tom Hiddleston Break Up After 3 Months: Report

"For both of us it was the wrong situation," Harris, 32, said of his nearly year-long relationship with Swift in the issue, in which he was named one of GQ's Men of the Year. "It clearly wasn't right, so it ended, but all of the stuff that happened afterwards..." Harris told the magazine that it's "very difficult" when something he considers so personal plays out in such a public way.

"The aftermath of the relationship was way more heavily publicised than the relationship itself," he said. "When we were together, we were very careful for it not to be a media circus. She respected my feelings in that sense. I'm not good at being a celebrity."