Summer House Star Opens Up About Borderline Personality Disorder Diagnosis

During the Season 10 reunion taping, Summer House star KJ Dillard made a courageous decision to share something deeply personal with the world. He revealed that he’d been hospitalized for about a week following filming wrapped, seeking treatment for self-harm after being diagnosed with Borderline Personality Disorder.

This wasn’t a casual mention. Dillard opened up to Andy Cohen about what led him to the hospital and what he’s learned in the aftermath. According to the National Institute of Mental Health, Borderline Personality Disorder severely impacts a person’s ability to regulate their emotions, affecting how they feel about themselves and how they relate to others. For Dillard, acknowledging this diagnosis meant confronting something he’d spent years avoiding—his own mental health struggles. He admitted he’d never dealt with his heavy issues head-on before, choosing instead to run away from problems. That pattern ultimately brought him to a breaking point.

What stood out during his vulnerable moment wasn’t just his honesty, but the support system that showed up for him. Ciara Miller and Mia Calabrese were there every single day during his hospitalization, sitting at his bedside. That kind of presence matters, especially when you’re fighting something as isolating as a mental health crisis. Jesse Solomon added his voice to the moment too, hugging Dillard and praising him for having the courage to tell his story on national television.

Dillard expressed gratitude for still being alive—a stark reminder that these struggles are real and can be life-threatening. By bringing his experience into the light at the reunion, he’s doing more than just opening up about his own journey. He’s signaling to others watching that mental health deserves the same attention and care we give to any other illness, and that asking for help isn’t weakness. It’s survival.

Part 2 of the reunion airs Tuesday, June 2, with Part 3 dropping June 9. If you or someone you know is struggling, help is available by calling or texting 988 or visiting 988lifeline.org.