Demi Lovato celebrated another major milestone in her career last night, and fiancé Jordan “Jutes” Lutes was right there by her side to show his support.

An excerpt from the book “Disney High” reveals the unhealthy and unsafe environment that surrounded Lovato as she struggled with disordered eating, self-harm, and sexual assault.

Lovato revealed to PEOPLE at a screening for their film 'Child Star' that "it's very easy to stay centered with him"

The two met while co-writing Lovato's song Substance and made their latest public appearance to promote Lovato's new film, which features conversations with past and present child stars reflecting on being thrust into the spotlight at a young age.