Good response, FP. Welcome to SR, stars27.
I especially second question 2. It's a lifestyle commitment, and it may be a bumpy ride.
Keep reading, keep asking questions, but don't be afraid to make the best decision for you and your future, regardless of what your emotions are telling you to do.
Good for him for coming clean and seeking help. Maybe he got off the elevator at a higher floor. Maybe he hasn't. Only time will tell.
Al-Anon is also a good resource for working on your own behaviors toward the alcoholic in your life. Might consider checking out a meeting or two.
Good luck!
~T