I was just going to suggest posting on the Friends and Families of Alcoholics Forum when I saw Ladyscribbler made the same suggestion. You can cut and paste the link.
Friends and Family of Alcoholics - SoberRecovery : Alcoholism Drug Addiction Help and Information
You are not to blame. He is feeling edgy and irritable because he is drinking or wants to drink. At least, that is my read on the situation. Hang in there.