Dude: you came back here! To me, that is epic...even though, right now, you may not feel that way. It's a huge indication that you're not giving up, which was always my response to a drinking episode.
I totally get the 'empty house' trigger, even though I live alone; mine is the 'unexpected day off work' trigger...my first thought is always "I could get drunk!" I have to immediately recognize the danger...
I'm glad you posted, and I'm sorry you're feeling the way you're feeling, and I hope you'll hang out here more often; as I said above, I feel like we've got friends here...