Hi Vanilla,
Welcome. The addict in my life is my adult son, and opiates are also his DOC.
I don't know if you've heard of the three Cs:
You didn't CAUSE his addiction
You can't CONTROL his addiction
You can't CURE his addiction.
You will find great advice, wisdom and support on this site. Read everything you can, especially the stickies. I am still struggling with my son's addiction, but I am learning little by little to take care of me, as I can not control what he does.
In the meantime, please be cautious with your valuables. I never believed my son was capable of stealing from me, until my credit cards, blank checks, jewelry, etc. began disappearing.
Stay strong and take care of YOURSELF.