Should I (F/27) say something about my friend’s (F/31) depression or let it go

r/

I’ve been friends with this girl for 6-7 years now. And I care a lot about her, I absolutely can’t imagine my life without her in it and we have the best of times together. We moved in together with our other best friend and it all seemed like a dream. This female friend always had alcohol and substance issues and I used to always have conversations about it but she’d get super reactive and defensive saying she’s not doing drugs that much. But she is using ❄️ at least 3 times a week and drinking every day if not every other day.

The longer she was sober since knowing her was 5 days. I gave up bringing it up but things are not changing. They’re getting worse and my dad is an alcoholic so I can sort of see where this is going. Looking at her now, she’s struggling but won’t admit it. Drinking, doing coke, can’t spend too much time alone, been in the same job for ages with no progression or salary increase, won’t change jobs, no hobbies, always angry always upset or snappy and hangover. It makes us sad because we don’t understand why she can’t see the issue.

Me and the other housemate drink once a week and refuse to join her parties. Because it’s during the week and we have jobs we care about. I don’t know how to have a conversation or how to get her to open up but I don’t like the person she’s becoming. And I’m afraid in the future we’ll part ways.

Any tips would be appreciated

TDLR: my friend’s addictions and alcohol issues are affecting our friendships and her own life and I don’t know how to talk about it