Demi Lovato and Max Ehrich. (Courtesy)

Demi Lovato has hinted that she's having a tough time in the wake of her split from fiancé Max Ehrich. The singer and former Disney star told fans "This has already been the longest October of my life" just a couple of days into the month. She also posted a picture of a neon sign that read "Good vibes only". The 28-year-old hasn't had an easy time lately. Demi, who has been open about her past struggles with addiction and mental health, dramatically split from actor Max not long after they'd got engaged.

It comes after Max sensationally claimed that she had used him in a "calculated PR stunt". He said in an Instagram video: "It’s just the craziest thing. This is the most bizarre experience that I hope no one ever has to experience, ever. Because no person deserves to feel this way. It's a calculated PR stunt, but my team is going to hate me for saying any of this." Max also lashed out after the break up, posting on Instagram: "Imagine finding out the status of your relationship through a tabloid."

Demi Lovato and Max Ehrich. (Courtesy)

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Max and Demi had become engaged just five months after they started dating. But just two months later, it's all over, and it doesn't seem very amicable. A source had said at the time: "It was a tough decision, but Demi and Max have decided to go their separate ways to focus on their respective careers. They have respect and love for one another and will always cherish the time they spent together."

Insiders later claimed that Max has proven untrustworthy in Demi's eyes. Demi was reportedly left hurt when she realised that Max's intentions weren't "genuine". An insider told People: "It was very hurtful to Demi when she realized that Max's intentions weren't genuine. Breaking off the engagement was not an easy decision."

Demi Lovato (Courtesy)

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Demi recently dropped what's believed to be her break up song on social media, tweeting track Still Have Me. In it, she sings: "I'm a mess and I'm still broken, but I'm finding my way back. And it feels like someone stolen all the light I ever had." She tweeted it, writing: "Music is always there for me... song in the am".