Give yourself time and you'll be free of this burden on your back, anewpage.
You can change and leave alcohol behind.
Maybe instead of saying to yourself 'I can't go to the store alone' focus on saying
'I will soon be able to go to the store, or anywhere, alone and not be troubled by thoughts of alcohol'
It will happen.
I think the suggestions here about more real life support are good too. It doesn't have to be AA - there are other meeting based recovery groups.
If you're interested I can give you a list
D