Maybe it would be helpful if you set some boundaries for yourself....you've gotta start somewhere, however small....or you will find yourself at the bottom of the snakepit again.
I can understand that you don't want to live alone....and in your particular circumstances, isolating might hinder you...but perhaps you and mom can support eachother?
stay active and go to the office/workplace. don't stay home with a bottle at your workstation...that is not where you want to be.
glad you are back and thinking of what you don't want.