Entertainment Music Mariah Carey All Smiles as She Steps Out with Boyfriend After Opening Up About Bipolar Disorder Mariah Carey was on hand to celebrate Bryan Tanaka's 35th birthday on Tuesday with a dinner at Mastro's Steak House in Beverly Hills By Stephanie Petit Stephanie Petit Stephanie Petit is a Royals Writer and Reporter at PEOPLE. People Editorial Guidelines Published on April 12, 2018 09:20 AM Share Tweet Pin Email Mariah Carey was seemingly in high spirits on Tuesday night as she stepped out with boyfriend Bryan Tanaka for his birthday — her first appearance in public since opening up exclusively to PEOPLE about her battle with bipolar disorder. The couple rang in Tanaka’s 35th birthday with a dinner at Mastro’s Steak House in Beverly Hills. She smiled as she walked into the bash hand-in-hand with Tanaka, who carried a gigantic gift bag. The songstress kept her ensemble simple, sporting a black mini dress, leather jacket and booties. Mariah Carey: My Battle with Bipolar Disorder SPW/Splash News Mariah Carey and Bryan Tanaka SPW/Splash News Although she was first diagnosed with bipolar disorder in 2001 (when she was hospitalized for a physical and mental breakdown), “I didn’t want to believe it,” the superstar singer-songwriter told PEOPLE editor in chief Jess Cagle in this week’s cover story. RELATED VIDEO: Mariah Carey: My Battle with Bipolar Disorder Carey said she finally sought treatment recently after “the hardest couple of years I’ve been through” — years of professional upheaval, an E! reality show and romantic drama. Mariah Carey on How She’s Treating Her Bipolar Disorder: ‘I’m in a Good Place’ “Until recently I lived in denial and isolation and in constant fear someone would expose me,” she said. “It was too heavy a burden to carry and I simply couldn’t do that anymore. I sought and received treatment, I put positive people around me and I got back to doing what I love — writing songs and making music.” Want to keep up with the latest from PEOPLE? Sign up for our daily newsletter to get our best stories of the day delivered straight to your inbox. However, Carey told PEOPLE she’s now in a good place. “I’m actually taking medication that seems to be pretty good,” she said of treating bipolar II, a disorder that involves periods of depression as well as hypomania (less severe than the mania associated with bipolar I, but can still cause irritability, sleeplessness and hyperactivity). And she said that she now approaches her treatment holistically. “I have access to great medical care. I’m exercising, getting acupuncture, eating healthy, spending quality time with my kids (Morrocan and Monroe, 6, with ex Nick Cannon) and doing what I love, which is writing songs and making music.” Mariah Carey on Why She Kept Her Bipolar Disorder Hidden for Years: ‘I Lived in Denial and Isolation’ For more on Mariah Carey and her battle with bipolar disorder, dealing with fame and raising twins, pick up the latest issue of PEOPLE, on newsstands Friday. For mental health support, contact the Depression and Bipolar Support Alliance at dbsalliance.org.