Hey, I'm a lawyer, too, and managed to marry another alcoholic after marrying a guy who got sober (and stayed that way). Number two almost died of drinking, and I married him after a BRIEF period of sobriety. When he went back to it, I left him after only a few months of marriage. AND then I became an alcoholic drinker, myself (now sober eight years--almost nine). So "smart" has nothing to do with it.
SMART was leaving before your life became more unmanageable than it already was. Be patient with yourself, it's only been a couple of weeks.
Incidentally, I didn't stop CARING about my second husband, either. But there was nothing I could do to help him and he had the right to live his own life. I didn't have to go down with the ship, however.