I want to welcome you and encourage you to go over to the Friends and Family forum. Read the stickies on the top, there is so much support and information there.
I understand where you are. Please keep your children #1. I did not leave my husband, we are still together. He is making a huge effort but I believe it is too little too late. I have an 8 and 14 year old, you would not believe the resentments they feel towards him and me too I think for enabling him. I will say that I know just what you mean. It turns you into someone you are not and don't want to be. My older daughter told me the other day off the cuff that she thinks I am bipolar. I was so sad as I have let myself change so much in reaction to alcoholism. However, I am working on that. I am getting the help I need and have set clear boundaries...for me.
God Bless!