And if he does love you he will go get help!
Just to reiterate what has been said here by co-dependents and recovering alcoholics alike, love simply has nothing to do with it. If love were enough to make an alcoholic stop drinking, none of us would be here!
He may get help, he may not. When only he is ready to admit that his life has become unmanageable due to drinking will he seek out the help he needs. In the meantime, you have to do what is right for you, whatever that choice may be, however hard it may be.