Alove: there is nothing to figure out. You love him, period! We love people and one or the other may go through something but it doesn't mean we don't love them.
Is he good for you? Right now, more likely, not!
It is good that he's working his program, but I don't buy the "no relationship while working a program"!
What does a person do who has a family, do they just walk away because they are in recovery?
I get detachment, but there are times, the pain of ending a relationship can also cause enough stress that the focus cannot be on the healing.
Yes some end it, some stay together through the process, It all depends on how bad the relationship is, and since you didn't tell us much about the relationship, it's hard to say whether this is good or not?