If his use has affected you. Then I am sure you have some issues to deal with too. You dont have to be a full blown codie.
Its hard I would imagine to watch soemone you love do that to themselves. And then I am sure there are a whole lot of other things that comeup as well.
Addicts rarely only affect themselves in addiction.
I know I drug everyone around me down intot he depths of hell with me.
HUGS...