If he is living with you, it is probably time to have him move on. It sounds like he is not living there, in which case it might be good to talk to him about life in general and leave his addiction and recovery up to him.
I found that my relationship with my own addicted son was much better when I stopped hounding him or making him feel guilty for upsetting me so much. He knows where recovery can be found and he will find it when he is ready.
Let me just clarify that before all of the above, I spent about 10 years crying, begging, pleading, manipulating, arguing and trying to talk sense to my son. I let him live at home so many times when he was trying and then it would always end badly when he relapsed.
It was only when I found my own recovery and learned to detach from his situation, that I could find peace and live life well. Today I say a prayer each morning and ask God to take care of my son, then I live my life in peace, knowing I have done all I can.
I'm glad you found us and hope your son finds a good path soon.
Hugs