Hello, @ricoventures,
I join @colleenyoung and @lindasmith1222 in responding to your very difficult situation. It undoubtedly is heartbreaking to see your family members not dealing with your nephew's addiction.
I agree with what Colleen and Linda have said already, that the most important thing that you can do right now is to take care of yourself. It is important to realize that the only person you can change is the person that you see in the mirror, and of course, that is you.
As Linda suggested, Al-Anon is a great group for people who have family members who are involved in addictive behaviors. Al-Anon groups value confidentiality and support for each other. Here is a website where you can learn more about Al-Anon, https://al-anon.org/
As you can see there is a box at the top of the web page that says "Meetings." When you click on that you can put in your city/state and find a listing of meetings nearby. These can be attended in-person and virtually, by phone or computer, as well. So if transportation or mobility is a problem for you or other concerned family members you can attend without leaving your house.
While your attendance at an Al-Anon meeting will not fix the problems your family is experiencing, it will help to give you some peace of mind as you talk with others who also have loved ones living in the cycle of addiction.
Does this sound like something you might want to try?
@sal, you could be your nephew's hero by approaching him alone and talk to his face about seeing a therapist to get to the root of his addiction because if he does not do anything soon, he will find a way to get into a bigger and bigger addition. This is a self-destructive behavior.