Bob: DON'T DO IT! Stay with us, hang in there, have faith. Don't go into it with the "If I fail" mentality, go into it with the "I will not fail" mentality. Easier said than done, yes, but keep repeating that to you. If you are religious, pray, pray, then pray some more. God can lift the urges from you if you let Him do so. Again, easier said than done. Use your strategies to avoid drinking. If you don't have strategies, let us help you develop them.
Mel: Those feelings you are having are completely, totally normal and are to be expected. You hit the nail on the head. The situations driving those feelings were there before but the alcohol masked them. The feelings will pass but it does take time. Don't allow yourself to isolate because then the darkness will come creeping in and we know the path that will lead us down. Force yourself to engage even if you don't want to. Even just calling your support systems. Friends, family. Hopefully you have someone or better yet, several someones, who know your struggles. Reach out to them and talk to them. Invite yourself over to their house. Get out and about. Socialize with your "safe zone" people.