You do not have to 'wait' to leave him for now. If you choose to separate it is all right, especially since at first it would just be a 'separation.' I do not know if FL has 'legal separation' where the paperwork goes before a family court judge or not.
It is okay for you to remove yourself from the situation, so that both of you "can work on your individual programs."
As to finding a qualified addiction counselor therapist, how about asking at before or after your Alanon meetings if anyone know of, has been, or is seeing a therapist that is fairly well versed in addiction and the problems that arise from addiction.
I understand your not wanting to 'close all doors' but possibly with a separation where each of you are living in separate accommodations you might better be able to see if his 'actions' match his words.
Whatever you decide, and while you are pondering a decision and after the decision is made ................................... we are walking with you in spirit.
Love and hugs,