Demi Lovato's ex-boyfriend Wilmer Valderrama was stunned by the news that the singer apparently had an overdose on Tuesday morning.
Sober singer, 25 years old, was found unconscious in her home in Hollywood Hills, California and taken to a hospital in Los Angeles. She is currently "stable," said a source close to the singer PEOPLE.
The actor, in turn, is "shocked," says a source close to the former couple.
"He knew she was going through a hard time, but he was not prepared for that," the source says. "He has seen her through so many ups and downs and has been her skirt through some of her darkest moments ̵
Insider adds to Valderrama "They've always taken great care of them and they really remained friends after they split up."
"Demi has always hoped that they will come together again in the future," the source continues. "He is the love of her life and vice versa."
The two dated for six years before separating into a joint statement on Instagram in June 2016. In February, a source close to the two said they were "super, super close and had a crazy love for each other."
"They are extremely close friends, but there is always potential for them to try a romantic relationship again," the source said.
The insider added that Lovato "is very loud about the fact that he is the love of her life, many of her problems were related to her age difference, but she has matured even in the last year really fun for her to be single and play around, but now she's starting to see that the grass is not always greener. "
Last fall, Lovato opened her relationship with the actor and said," I never have anyone loved as I loved Wilmer. "
Lovatos representative confirmed in a statement to PEOPLE late Tuesday that the Singer was in a stable condition.
"Demi is awake and with her family, who want to thank everyone for their love, prayer and support," the spokesman said. "Some of the reported information is incorrect and they respectfully ask for privacy rather than speculation as their health and recovery is most important right now."
Those who were close to the Stone Cold singer noticed red flags for months. A source told people Lovato's recent activities made it clear that the star had fallen behind.
"You could see that Demi was sober with her sobriety because she did not hang out in clubs," the source said. "She's still doing a very good job of her daily life, but there are definitely signs that she's not good with her sobriety."
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Another source close to the situation added, "Things have been a total mess for months, she and her team were parting ties, and they played a big part in sobering them years ago
Meanwhile, another insider shares, "Demi was never really clean and sober of all her demons, she's been battling depression and fears for quite some time – and she's still in such a dark place for a while sober but not sober for six years. "
Lovato's hospitalization comes four weeks after her relapse after six years of sobriety.
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On June 21, the Grammy contestant released the emotional single "Sober," in which she sings, "Mom, I'm so sorry." I am no longer sober / And dad, please forgive me the drinks lying on the floor.
Lovato has been struggling with addictions, mental illness and eating disorders for years, and in 2010 she was admitted to treatment for bipolar disorder, bulimia, self-harm and addiction, and she relapsed after leaving the treatment center and entered sober living for a year.
The star has been very open about her alcohol and drug addiction over the years, most recently on her issues in the YouTube documentation. Simply Complicated  RELATED: Demi Lovato's Mother Details The appalling mental health and addiction of her family's family
Meanwhile Lovato was honored in September 2017 with the "Spirit of Sobriety" award at the Brent Shapiro Foundation for Drug Prevention Summer Spectacular in Beverly Hills.
"Every day is a battle," she said at the time. "You just have to do it one day at a time, some days are easier than others and some forget to drink and use, but for me, I work on my physical health, which is important, but also in my mental health."