Just as Joe Jonas is showing the world he's happily dating Demi Lovato, another Jonas brother finds himself single: Nick Jonas and his on-again, off-again girlfriend Selena Gomez have called it quits, a source confirms to PEOPLE.
Though the couple never publicly confirmed they rekindled their relationship, the source says, "They were an item, but they are no longer together."
According to the source, the Disney Channel stars, both 17, broke up in early March, largely because work was going to keep them apart: Gomez is scheduled to film a movie in Europe this summer, while Jonas is expected to tour with his siblings at the same time.
Though they are no longer romantically involved, "it's evident to everyone that they will always have a super strong connection," says the source.
Since the split, Jonas has been filming his show Jonas, and Gomez has also tried to distract herself with her active work schedule, which includes designing a clothing line for Kmart and promoting her album Kiss & Tell in Spain and France.
"It's never fun to go through a breakup," says the source, "but Selena has a lot of friends she's leaning on for support."