Hi, and congrats on Day 3.
I'm co dependent too. And an alcoholic. I'm sober. My husband isn't. You absolutely can get sober for yourself. The last time I quit I just said "I'm done." No big announcements. And then I stuck with it, regardless of what my husband was doing.
That's where the co-dependence comes in because I want to fix, manage and control what he's doing. I've had to work on only taking care of my own stuff. It's hard, but doable and I wish you well.