Grown Children Addicted

I just read another mans statement about his son, mine sounds about the same but I have spent 5 years training my son my profession and thats all hes got. He has stolen from customers and can't work on my jobs anymore and I have been letting him work on empty houses and I know this is not good for either of us. I also need his help and have absolutely had it with all the trimmings of an addict. He steals, lies, takes advantage of everyone and everything he can just to get a few bucks and get on with his addiction.I just got a call from him telling me he had met a new girl from another country and her parents are very wealthy, I just shake my head and wonder whats next?? Prison, dead, beat half to death etc;It just goes on and on and I want to tell him to not contact me or even talk to me until hes really ready to take the step to healing, is this a wrong way to do this or will I regret this , especially if something bad where to really happen.I could go on but I know theres thousands of us out here and we just want to know whats the best thing to do.. I am 58 years old and I just can't keep this up for it is really taking a physical toll on myself and my wife!!! A miracle would be greatly appreciated.