The musician, 44, whose divorce from Berry was finalized six years ago, proposed to Manuela Testolini in November with an antique diamond ring he designed, Benet confirms to PEOPLE.
"During a romantic dinner I decided to finally let Manuela hear 'Never Want to Live Without You,' a song off my new album that I had written for her," Benet says. "I sang it to her, then got down on one knee and proposed."
Manuela, an entrepreneur and founder of the charity In A Perfect World, was formerly married to Prince. She has been dating Benet for three years.
The wedding is set for this summer.