I have the exact same feeling, today is day 0 for me. I know you can do it.
Doing it for your gf and family is huge. I just put an updated photo of my daughter on my phone to look at if I have urges to drive to the casino.
I feel your pain, I too had a big six figure win which would have set me up for a very comfortable holiday season. But I gave it back and more and now I am empty and have so much remorse. If only I had stopped, but I can’t. It’s day one for me.
This is a very inspiring story as I work through day 1