Dialectical Behavior Therapy (DBT)

DBT is a set of skills to help you deal with overwhelming emotions.
It is taught in four modules: Mindfulness, Interpersonal Effectiveness, Emotion Regulation, and Distress Tolerance.  “Dialectical behavior therapy (DBT) is an evidence-based psychotherapy that began with efforts to treat personality disorders, ADHD, and interpersonal conflicts.[1]
It was initially created by Marsha Linehan, PhD for people with Borderline Personality Disorder, but has since been proven to be very helpful for many other disorders.

There are group therapy program that meet from several months to 2-3 years.  Look in your local area to see if there is a program available. Many insurance companies will pay for this type of therapy.  There are also therapists who specialize in DBT, often combining individual therapy and group therapy.