Josh Altman and Heather Bilyeu

Million Dollar Listing's Josh Altman is engaged to long-time girlfriend Heather Bilyeu, the couple told Bravo's The Dish blog Tuesday.

"It was just the right moment," Altman said of his proposal on June 22. "I love her more than anything in the world. She's my best friend. There's nobody I'd rather spend the rest of my life with than her."

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Altman, who has been dating Bilyeu for three years, popped the question during a walk-through of one of his listings. The duo first met three years ago while filming Million Dollar Listing Los Angeles, which returns for its sixth season on Wednesday at 9/8c on Bravo.