Yes. There is a certification specialty called CA which is certified addictions professionals. Psychologists, psychiatrists, and social workers and so forth with this set of letters after their name have a specialty in addictions.

Yes, if you take the decision to stop your addiction you can use psychotherapy as part of your treatment. It’s not a miracle way but if you get involve and with good disposition you can do it.

Is psychotherapy effective for addiction? Well, yes and no. Most therapists will insist they can treat addiction but fall woefully short. A few have broad experience in addiction treatment and can do quite well. A common scenario is someone finally admits to others he/she has an addiction problem but does NOT want enter into any sort of rehab. So they find a therapist they can string along. Bottom line: usually addiction treatment is best managed by addiction specialists.

Consider this link...
https://www.mentalhelp.net/substance-abuse/psychotherapy/