Downs -
I too gutted for most of 23 years. I never truely hid what I was doing but I found out when I quit that most people did not know I did it, though I spoke to them face to face with it in my lip.
I was similar in the dipping on wedding day, and when my sons were born (what a nice celebratory dip, yeah lets kill myself....dumbass).
You have the right attitude as this is all for you, be selfish. And remember to let those around you know that you are quitting. That is a huge help so when you lash out, and you will, they will know that its the quit and nothing personal.
Keep strong as you are almost through with the physical effects of withdrawl, then it will just be the mind games, but I promise that it will be much better on the other side.
PM me if ya need anything. I quit with you today,