Ariana Grande rang in her 24th on Monday, and her boyfriend Mac Miller wasted no time showering her with birthday love. Along with a silly black-and-white photo [2] of the two in Paris, the 25-year-old rapper penned an adoring message for his other half [3]. "Happy Birthday to this adorable pure soul who has reminded me what being happy feels like," he wrote. "Thank you for loving me so good. I think it's supposed to be 'so well' but I don't care. I love you and can't wait for all of the adventures." Ariana and Mac have been dating [4] since August 2016 and Ariana recently sparked engagement rumors when she wore a diamond sparkler [5] on her ring finger. While nothing has officially been confirmed yet, it's also worth noting that Ariana and Mac never actually confirmed [6] their relationship, either.