If you are submitting a support group website (e.g., AA, NA, ACOA, Al-Anon, etc.) please find the appropriate local subcategory under Health/Addictions/Substance_Abuse/Alcoholism/Support_Groups or the more general Health/Addictions/Substance_Abuse/Support_Groups
Note that some of these categories are further divided such that there are subcategories for individual countries and states.
It is important for you to find the most specific subcategory so we can speed up the process of getting your site listed. Otherwise, we have to waste a great deal of time sorting. The more specific the subcategory of entry, the quicker the site will get listed.
It may help to conduct a directory-search by entering keywords in a search box, which appear on every page. Try to find a specific and local subcategory that contains sites similar to the one you wish to submit.