Demi Lovato is sharing how she found hope during her intense mental health battle. The Camp Rock alum, 31, spoke with Dr. Charlie Shaffer, Anna Wintour’s son, on Monday, June 3, at The Center For Youth Mental Health at New York-Presbyterian’s annual benefit to discuss how she never gave up on herself after doing numerous stints at treatment centers. “I have been to inpatient treatment five times, and it has something that every single time I walked back into a treatment center, I felt defeated,” she confessed. “And I know that experience firsthand, but I think the glimmer of hope was when I st…