Hi and welcome to SR littlesister
Like others have said I believe the drive for recovery needs to be an internal one.
I know it's hard to watch our loved ones fall apart tho.
I think Anna's suggestion of al anon is a good one. You'll find support and understanding there for you, as well as the experience of others who've been in similar situations.
We also have a Family and Friends section you may want to check out.
Friends and Family of Alcoholics - SoberRecovery : Alcoholism Drug Addiction Help and Information