"My significant other right now is myself, which is what happens when you suffer from multiple personality disorder and self-obsession"

In this quote, Joaquin Phoenix is expressing that his existing better half is himself. This may seem puzzling in the beginning, but he goes on to describe that this is an outcome of suffering from multiple personality condition and being extremely focused on oneself. This recommends that Phoenix is struggling with his own identity and perhaps has difficulty forming meaningful relationships with others. He might also be acknowledging the unfavorable impact of his self-obsession on his ability to connect with others. Overall, this quote highlights the intricacies of psychological health and the challenges of preserving healthy relationships when handling individual battles.