I should add that it wasn't quite so simple. After I asked him to leave he holed up in his office/art studio and drank steadily. We had another intervention, and he went to another rehab which nearly bankrupted us. He came home after that despite my attempts to find him another place to stay, and slept on the couch for 2 months, refused to leave, so I, having already filed for divorce, packed up the kids and went to my parents' for 5 months before moving into my own place in March. Luckily my parents are close by and my son could attend the same school throughout.
Just thought I should clarify. Extricating oneself from a relationship with an addicted partner is never simple or easy.