(((((((((Griffe/Vince)))))))))))))

Getting out of the way of temptation is a good step. I think your gf might have a good idea, in you choosing to be staying elsewhere right now.

Sometimes we need to change our friends or the ways in which we interact with others if they're "bad" for us and will enable us to continue with our same destructive patterns. (Like me for instance, hanging out with some of my guy friends now in a bar might not be a good thing, because I may wind up drinking and I'm trying to quit).

Don't give up. Reach out for support. Ask your T, or a doctor, or spend more time with clean and sober friends for support. If you're looking into quitting (seriously) you can always consider AA or any other way of quitting (there are quite a few, some self-directed and some as a group process).

I'll admit though, the first while is the hardest, because the substances in the system slowly leave. It's withdrawal. That's never fun, but if you can get through that... you're much better prepared to deal with everything else.