Sounds like you've got a pretty full plate! "Work hard, play hard" is sort of a potent recipe for burn out. One thing to consider, if your drinking has worn out your friends they might be surprisingly supportive of your recovery. You just might find out who your real friends are.
Don't feel ashamed. Keep us posted on your progress. You aren't alone. In fact, I just blew 5days of sobriety with back to back nights of getting blackout drunk. I'm kind of amazed I didn't wake up to a pile of broken guitars myself!
Good luck!