Jessica, this is a period of time--an opportunity for you to get some support and prepare yourself for whatever you are going to face when he gets out of rehab. I am sorry to say that if he doesn't change his attitude drastically, and soon, he does not sound ready for sobriety.
Use this forum to learn everything you can about alcoholism and take the steps necessary to get your future lined up. I would suggest to keep your communications with him to a minimum. Don't listen to his complaining and whining. If he starts--just tell him to take it up with the staff.
I imagine that you want his sobriety more than he does at this point. It doesn't matter what we WANT, though. It is important that we deal with reality.
dandylion