It sounds like he is trying to be a good person for your daughter. He is admitting his addiction and that is a HUGE step for addicts. As hard as it is, now is the time for you to let him focus on himself and you fully turn the focus onto you and your daughter and how to take care of you. Rehab is not a cure and although it "sounds" like he is trying to do the right thing, addicts can always relapse. you need to prepare yourself to be in a position that you can take care of you and your child without your husband.
Acceptance is so hard when it comes to addiction because you have to accept that part of the person too. The good with the bad....the hard with the easy. It is up to you to decide if the addict part of your husband is acceptable to you.
HUGS...I've been there. I know it is devastating, heartbreaking and infuriating all in one big fat ball.