The singer and her former boyfriend, musician and bartender Luc Carl, have recently reconciled, PEOPLE reports in its latest issue, on newsstands Friday.
Carl and Gaga, 24, split a few years ago – but the pair started dating again a couple of weeks ago, says a source. Last month, in fact, the couple went public with their romance, attending a New York Mets game together.
"Gaga's first album is entirely about their relationship and her latest song, 'You and I,' is about how they got back together," adds the source. "They've been in love for a while."
If the song's lyrics are any indication, Gaga intends to keep her man close by: "It's been a long time but I'm back in town/But this time I'm not leaving without you," she sings.
Gaga's rep had no comment as Gaga performed to a record-setting crowd at Rockefeller Center Friday morning for a full half-hour of the Today show.