It is extremely important. Extremely. That when you moe out you do not allow him to slowly ween himself off of you. You need to cut the cords like a knife. Completely dark. No answering phones. No sleepovers. Drop off the kids on neutral territory, don't stay to chat, don't care if he cries. This is his chance to hit rock bottom and it's not just the R that is at stake but his entire inner core being, ehich is insane, fractured and a mess. You need to let him break. completely. This is the only way he can be rebuilt.