GF wants to break up cuz i smoke.

[LuckyG]

There is always 2 sides to every story. Some of the guys I know in my world, that after they blaze, their worthless!! They get all lazy, dont want do anything except play games. IF, I was a girl, and was around that everyday, well phuck, I'd want a change also.

Talk honestly and up front to her to find out her exact reason to dump the relationship. Maybe it's not the weed, but the side effects.
If she will not elobrate, then maybe, it's time find other ladies in your comfort zone.

I'd talk or walk.

Quoted for truth. I prefer to get stoned by myself rather than with most of my friends, it's not fun just sitting around watching Simpsons.

Nobody here can really tell you what to do, because nobody here knows the full story between you two. It's all you, man - make a decision and stick with it, for better or for worse.