Ok, let's say she does go to rehab.
Then what?
Rehab is not Tylenol that will just take away the pain in half an hour.
It's a life time progress.
Stop giving her false hopes. Either be there for her forever, or let it go.
Are you ready to house her, feed her, help her find a job, keep 24/7 eye on her from straying? Are you Steve? Cause that's what she may be thinking? She may be thinking if all fails, she'll talk you into taking her in and taking care of her, only if she keeps promising to go to rehab.
So unless you're ready to do that, stop talking to her already!
IF and when she gets sober, and finds a job, and lives on her own drug free, and hopefully desease free,......you might have a chance at a relationship of some sort.
As of now, how it looks, she is pretty unemployable other than the employment she's use to doing on the street and the underworld.
You're giving her false hopes, just as much as she's giving you false hopes.