I'm interested in but skeptical of the practice of psychiatry. They've made some big errors in the past and continue to do so. The answers to happiness and unlearning "mental disorders" I have found, not in this practice of medical science, but in philosophy: "Mindfulness," which is associated with Eastern or New Age thought, but may well be authentically Western, Judeo-Christian and "biblical" even.
From the New York Times:
Dr. Linehan’s own emerging approach to treatment — now called dialectical behavior therapy, or D.B.T. — would also have to include day-to-day skills. A commitment means very little, after all, if people do not have the tools to carry it out. She borrowed some of these from other behavioral therapies and added elements, like opposite action, in which patients act opposite to the way they feel when an emotion is inappropriate; and mindfulness meditation, a Zen technique in which people focus on their breath and observe their emotions come and go without acting on them. (Mindfulness is now a staple of many kinds of psychotherapy.)
Ultimately there is a way to train your mind that is analogous to training your muscles. The problem is so many folks are unaware; it's like not knowing how to lift weights to get your body stronger or how to run to improve your cardiovascular health.