Don't beat yourself up, pull yourself up. And quitting weed for someone else will never work. Maybe it will work for a bit, but you already resent that you have to quit, so it won't last very long. Take a step back on this issue......you ask her to stop using so she says "I will if you will". You both are trying to control each other, that is a bad sign for the relationship, a natural sign but bad nonetheless. Good luck