Felt like drinking the bar dry

I've been feeling very tempted lately. I've lost all the reasons why I stopped drinking and just don't see the point in staying sober any more. Tonight when I was closing up in work(I manage a bar that I live above) I was having a drink with one of my coworkers as it had been a good night. I was happy sitting there drinking my Heineken 0% and then all of a sudden an urge just came over me. I've got a day off tomorrow so my brain was thinking I should just stay here a while longer, watch TV and keep pouring myself pints of Guinness until I passed out. My neighbours walked past with their dog and I quickly snapped out of it but the temptation was very real. Anybody have any similar urges like that? Not to just have one drink but to want to have shit loads of drink until you can't drink any more.