Drug dependency doesn't mean you take it everyday.
Addiction has many forms. The frequency is just a unit of measurement. It's still addiction.
Anyway using weekly ends up being daily.
However I know you don't want to be an enabler but reporting her will send her on a downward spiral. You will accelerate the risk.
I'm a recovering addict. (You never recover). My opinion is considered harsh but some people have to learn the hard way. Which is what I did.
For all those who can't comprehend the situation: people don't just abuse substances because they're addicted to the substance. It's mostly psychological.
she is not wanting to deal with her emotions and is using coke and alcohol to avoid facing upto them.
Her brain now is accustomed to the increase of dopamine at certain times and coming of will make her emotionally unstable, lonely and feel a huge void in her life.
She sounds isolated and wants to isolate her self.
She also needs to want to change. She may need a therapist.
I went through many therapists. I came across an app called betterhelp, its convenient for me as it's mobile and on FaceTime.
When you fill out the form she can just say she's unemployed etc and she'd be offered a discount of 40% or so for 3 months.
Maybe she needs an outlet and safe space and slowly replace her bad habits with good ones.
It took me 2 years to get of coke and start living in the present and being present. (I've only done 10 months of therapy) as I'd slip up some times but what the previous person said about cardiac arrest is very real.
Also as an ex dealer, I know there's a lot of sh*t out on the streets.
My most recent slip up, I ended up in hospital and the doctor told me next time it'll be a body bag.
As I've been clean for a while, my body can't handle even a couple of grams. Coke screws with all the neural pathways and nervous system.
You should gently intervene and let her know you're worried about her and suggest her therapy or giving her more of your time.
It's not an easy road for you to take on, addicts are clingy and will slip up a lot. You're better off convincing her to go to therapy.
I hope all goes well