Yolanda Foster has had a rocky year, but she's staying positive.
Despite her split from her husband, music producer David Foster, earlier this month, and her continued battle with Lyme disease, the former supermodel and Real Housewives of Beverly Hills star is finding the silver lining. The 51-year-old reality star -- who was diagnosed with the illness in 2012 -- has been taking to Instagram to share updates on her health and "new life," accompanied by inspiring messages.
PHOTOS: Yolanda Foster Sells Malibu Mansion to Concentrate on Battling Lyme Disease
In October, Foster said goodbye to her 12,000 square-foot mansion in Malibu, California, which she shared with her ex-husband, and a source tells ET that she has since moved into a condo in West Los Angeles. "First day of the rest of my life #DefiningMoment #NewBeginnings #OneFootInFronttOfTheOther #HomeSweetHome," a caption on a photo of her phone displaying the date Dec. 11 read.
In another snap, Foster appears happy and comfortable in her new bedroom. "If God brings you to it, he will bring you through it," she wrote, with hashtags "#Faith #BuildingTheNew #OneDayAtATime #NightNight."
WATCH: EXCLUSIVE: Yolanda Foster Says She's 'Heartbroken' Following Split From David Foster
She also notes that when the days are extra rough, she gets by with a little help from her friends. "Some people come into your life as a blessing," she captioned a photo of her "bestie," Kelly Fisher Katz. "Thank you for being YOU and showing me the true meaning of love and friendship through the good and the bad."
Despite reports that Foster has gotten back with her ex-husband, Mohamed Hadid, a source tells ET that the two are just close friends.
"They're not hooking up," the source revealed. "They've been great friends ever since their divorce and she's always welcome at his home. If she's in town and he's having a family get-together or party she will always show up."
"She's friendly with his fiancé, Shiva," the source added. "There's no tension between them. He is crazy about Shiva." Foster and Hadid tied the knot in 1994 and called it quits in 2000. They share three children: Gigi, 20, Bella, 19, and Anwar, 16.
WATCH: Yolanda Foster Says Lyme Disease Changed the Dynamic of Her Marriage
The same week Foster announced her split from David, ET chatted with her at the Real Housewives of Beverly Hills premiere. "Obviously, this is a difficult time and I'm heartbroken," she admitted. "But [I'm] grateful to have my job and be dressed up and out of bed."
A few days later, she called into Watch What Happens Live and told host Andy Cohen that her illness took a toll on the couple's marriage.
"Chronic long term illness is extremely challenging, not only for the person that's sick, but also for the caregiver," she said. "It for sure changed the dynamic of our relationship."
As ET previously reported, the RHOBH star isn't the only one in the family who has Lyme disease -- Bella and Anwar also have the condition. ET caught up with Gigi at the Global Lyme Alliance Gala in New York City in October, where she got emotional while talking about the medical challenges her family is facing.
WATCH: Gigi Hadid Reveals Her Siblings Also Have Lyme Disease
"It's been really hard for me because I'm the only one that doesn't really understand it," she explained. "What's been hardest for me is just trying to find a way to be their hope and kind of be a strength for them even with the disease that I can't understand fully because I haven't been through it."
Watch the video below to hear more.