Addiction is a progressive illness. It always gets worse.
Without treatment and recovery it ends in jail, insitutions, death.
It is a family disease. It effects everyone in contact with it and mostly the family. It will make the rest of the family as sick as the addict.
I suggest you check out al-anon or nar-anon for yourself.
We teach you that:
You didn't cause it
You can't control it
You can't cure it
The healthiest thing you can do right now is to focus on yourself and taking care of yourself and your well being and happiness.
I guarantee you if you live with untreated addiction and codependence you will lose all those things completely.
He will get help only when he feels the need for it in a very real way.