it is often recommended that a newly sober person focus solely on himself and learning to live a sober life, process feelings, make ammends, etc, for one year prior to dating/being in a relationship.
if you can't quite bear to kick him to the curb just now, tell him that in order for you to feel like you two have a chance at something real, he needs to get up on that wagon, and stay on it for one year, then he can call you up and ask you out. this strategy does a few things: for one, he can't argue with you (or lie) saying "i'm sober now!".
i got a hundred bucks says he either won't call you, or you won't answer.