Wounded One, this might sting but it's closer to the truth: she's thinking about herself, not you.
While we want to think our addict thinks/cares/wants us, it's not for the reasons that's healthy for us.
Especially since she's just out of rehab, the first thing an addict starts to gravitate towards is some level of familiarity, be it a place, person or mindset.
The only good, which also happens to be the best, thing she's done was cut you loose.
Trust this opinion from someone who's still married to an addict: you don't want to get any closer to this situation than you already have been.
So I'll give you the advice I gave someone else very recently:
It's time to grab hold of the wheel, turn towards a new destiny and repeat the lines of Captain Jack Sparrow: 'Now, bring me the horizon!'