Welcome coricivic!
Congratulations for deciding to get clean/sober! I really hope your gf decides to get clean, too, but you probably need to prepare yourself for the possibility that she won't. In the end, the only person we can control is ourselves. It might sound harsh at first, but it can be an emotional roller coaster living with someone in active addiction unless we can practice detachment.
Glad you're here - check out the section on substance abuse, too - lots of support there as well.