Al-Anon Family Group Online meetings. MIP Also provides Alcoholics Anonymous, Adult Children, ACOA and Child Abuse Survivors meetings and Chat! look at the orange box there is info on online Alanon meetings.
Online Al-Anon Family Group, Support Group of Family and Friends of Alcoholics. MIP 12 Step Forums also provides onlin Alcoholics Anonymous, Adult Children Anonymous and Abuse Survivors 12 Step Meetings and Chat, Webmaster: John Freifeld
If you are afraid of his reaction perhaps its better not to discuss it? I don't know... I am afraid for your safety... is talking with the bio mom an option? perhaps she is away and struggling but she is the mom anyway and perhaps, if he doesn't move Earth to get her son back with her she can at least grant you custody... gosh what a difficult situation.
I hope you can make it to the online meetings!