Advice.....

well i just broke up with my girlfriend about 2 days ago. but i hooked up with my friends cousin 3 days ago ( becuase my ex is a crazy bitch.) she told me this story about how she had alchhol poisining and quit drinking and in moment of pure highness. becuz i was high. very much so in fact. i told her i would quit smoking weed. now this moring i got high. i feel pretty bad. should i tell her i have no plans to stopp smoking and that i was just high. or just toke up while shes not around?

tell her so you don't have to sneak around here, you'll get tired of doing it eventually

Honesty is key. If she can't accept you for who you are, then she doesn't need you.