Welcome, Rosemary! Kenton is right - you've got to find something to fill the hole that alcohol formerly occupied, otherwise the loneliness for your "former best friend" will drive you back to it. For the first two weeks I planned every day ahead in detail - what I was going to eat, any project I was going to work on, what book I was going to read, etc. - just to make sure I had a full schedule. You might want to plan something fun with the kids (scrapbooking, a "picnic" in the yard, etc.), then a treat for yourself after they've gone to bed - a movie, a bubble bath, whatever you want as long as it's not that one thing.
And post whenever you need it - someone is always here to help!