Welcome, glad you have found SR
I have found it helpful to read and learn as much as possible about alcoholism while taking care of myself first and foremost.
I agree with all of the previous posts here: You know what you know, don't doubt yourself. It is impossible to reason with an active alcoholic, it will destroy your sanity.
Read and post; so much wisdom and support here. And definitely go to that meeting, you will feel so much better. You are not alone.