I want you to know I’m in this with you. We’re going to fight this together.” Maybe your friend’s child is the one suffering or being treated at a rehabilitation center: You might say, “I care about you and am here to listen if you need to talk.” One more thing—addiction is a sensitive topic. So keeping your conversations confidential will show your friend you respect their privacy and will give them reassurance to express their feelings freely.
I am so sorry to hear of this unexpected loss. Please accept my heartfelt condolences.