I'm really glad your gf is quitting too Orig ...and I've no wish to bring you down, but my experience compels me to say this:
do this for you, noone else - because I believe that's the only way this works...and yes, support is awesome, but you have to do the work for yourself, just like your gf will.
and think about something more than willpower, Original...cos for me even tandem collective willpower didn't cut it.
D