Demi Lovato opens up about her broken engagement to Max Ehrich and says their relationship was 'false advertising'

• Demi Lovato's new documentary "Dancing With the Devil" premiered at SXSW this week.
• In the film, she discussed her two-month engagement with Max Ehrich and why she decided to end it.
• "The hardest part of the breakup was mourning the person that I thought he was."

Demi Lovato addressed her whirlwind engagement to Max Ehrich, as well as their sudden split, in her new documentary "Dancing With the Devil."

The film included interviews with her friends and family, all saying they liked Ehrich at first and were happy for the couple. Then, it showed a self-filmed video of Lovato just after they broke up in September.

"My life has kind of flipped upside down. I am no longer engaged," she said to the camera. "I'm really sad that things ended the way that they did. Good news is, I haven't picked up any hard drugs or anything like that. I'm hanging in there."

The film then cut to another self-filmed video of Lovato from later that same night. This time, she was actively crying.

"The video I made earlier wasn't an accurate representation of what I'm going through," she said. "I thought this whole time that I didn't miss him. I just miss the person that I started quarantining with."

Lovato explained her decision to break off the engagement in an interview.

"I think I rushed into something that I thought was what I was supposed to do," she said. "I realized as time went on that I didn't actually know the person that I was engaged to."

The "I Love Me" singer also told her friends that she "felt fooled."

"We were only together four or five months, and honestly, it was false advertising," she said. "The hardest part of the breakup was mourning the person that I thought he was."

"I mean, I was just as shocked as the rest of the world at some of the things that were said and done."

Shortly before they announced their split, old "thirst tweets" from Ehrich went viral, which saw him pining for multiple famous women, including Selena Gomez, Ariana Grande, and Miley Cyrus.

It was reported that Lovato began to question Ehrich's "intentions," and suspected that he was using her to boost his own celebrity.

Six days later, Lovato released a self-love ballad titled "Still Have Me."

Ehrich then accused her of using their breakup for a "calculated PR stunt."

"I was in love. The whole world should frickin' know it. I thought I found the real deal. Now I found out that I was used," he said during an appearance on Instagram Live.

"But I hope the song's No. 1 because, you know what, if that's what someone wants in the material world - here you go, you have it," he continued. "I hope this makes you happy. Enjoy. You just lost someone who loved you fully, completely, infinitely, for everything."

More recently, Lovato said she's "too queer" to be involved with a cisgender man right now.

"This past year I was engaged to a man, and when it didn't work, I was like, 'This is a huge sign.' I thought I was going to spend my life with someone. Now that I wasn't going to, I felt this sense of relief that I could live my truth," she told Glamour.

She echoed that sentiment in "Dancing With the Devil," which premiered at SXSW this week.

"There's so much more of me that I have yet to explore," she said. "I'm not willing to put a label on it right this second, and I think I will get there, but there's a lot of things I have to do for myself first."