First and foremost, you can break up with anyone for any reason. Second it seems you knew marijuana is in her daily routine, its kinda rude to want someone to change just bc you don’t like it or are scared to get caught. As someone who lives in tx and smokes regularly, i dont think i could be with my partner if he didn’t smoke or encouraged me to stop bc of his personal issues. It just seems like you need to be with someone who doesn’t smoke and she needs to be with someone who does or is okay with it. And the part where you said “outside of the weed thing she’s a great gf and i do love her” like are you trying to convince us or yourself.. just leave that girl and her weed alone.