Hi Tetrax,
First of all , it's great that you are back on SR. I'm sorry that you have to go through this alone.
But, just remember, even people living with others have to go it alone. Sure they may have a spouse's support , and that helps, but I kept my sobriety a secret for a while and walked the first couple of miles alone. Ultimately the journey is yours, and yours alone.
Also even having a husband and children - I FELT alone.
Someone mentioned that feeling alone while on your own , is because you most probably don't like who you are.
Try and remember how great it felt when you stayed sober for those
6 months. Try and use that as an incentive - you can feel that way again. You can do this, you know you can.
I would reach out to that friend who asked you to join in an AA meeting. Even if you don't like the meeting, it would be great to have someone like her/him to talk to . Take the help being offered. Please.