Whether it is addiction or not, is this really all right with you:
"Friday night is the usual night my husband goes out after work and drinks AND GETS HIS DRUGS."
I can tell you that if I was married to someone who used cocaine AT ALL, it would not be okay with me.
It is not okay. He is moving into the party life. He is moving into the drug lifestyle. What you are tolerating would not be okay with most healthy women. A husband doing illegal drugs, snorting or smoking coke as a way to unwind after a week of work . . . a healthy woman would not see this as okay whether it is addiction or not.
Your life has become so small that you can't see it. This is what starts to happen. Believe me. What others can see, you can't see.
You're married. You have a home together. Cocaine should not be a part of this picture. At all.