While I don't think that you can change anyone from the way that
they are.You can change their perceptions and habits.
Example:I drank alcohol for over 32yrs.I haven't touched alcohol
in approx. 9yrs.7 1/2mo. I wanted to stop.
I smoked cigarettes for over 12yrs.2pks. of Camels a day.I haven't touched cigarettes in over 30yrs.(pot only)I quit because
I realised it was a habit.
It can be done but your g/f has to desire to have it done. Irish
P.S.As usual;that's just my $.02.

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Irish---Better to be dead & cool,then alive & uncool!
(Harley Davidson & the Marlboro Man)