Pete Davidson is ready to talk about everything, including the end of three of his most high-profile relationships. The Saturday Night Live comedian did a 52-minute interview with Charlamagne Tha God where he addressed his rehab stints, mental health struggles and drug use (Davidson has PTSD, borderline personality disorder, and depression), and sudden fame after dating Ariana Grande.First, Davidson confirmed he and Kaia Gerber split up because of his mental health issues.