I don't know if this would help you, but I have tried it and found it provided some relief. Take a picture of your loved one into a closed room and tell them all of your worries and concerns . . . things you would not be able to say to them in person. I pray before doing this and light a candle - tell him how much you love him, how worried you are, how you wanted so much for him, how you are angry and sad about what he has done to himself, and any hopes you have about his recovery and then end with unconditional love . . .just send him lots of love and for yourself, I second the idea to get a two hour massage. You will feel like a new person.
I also use Bach Flower Essences, but they have a tiny bit of alcohol in them, so I am curious about sharing these with alcoholics/addicts.
Peace to you and prayers for you and your son.