NewImage,
I am so deeply sorry. We have many parents on this forum and they will share their compassion and experience with you.
In the 12-Step program, a phrase I have heard many times among recovering people is "the greatest good for the greatest number."
I learned that the addict does not get to be the most important person in the family. The addict does not get to take the entire family down.
You did the right thing. Please do not be alone with your grief.
I am very glad you are sharing your experience here. So many people will read your words. They will feel less alone. And validated.
God bless you. I pray for your entire family's highest good.