<human>: Can you condense the text into a few key points?

We've been together for 4 years. She's had various but very mild psychological issues over the years and I've always suggested she see a counselor. She finally agreed to start counseling last fall. She's been diagnosed bipolar and is receiving medication. She's seemed to do better once it started.

Shortly after the beginning of this year, she made friends with a dealer and has began replacing her meds with smoking weed almost every day. She claims it works better for her than prescription meds, but she's now displaying a plethora of new and more concerning symptoms. Insomnia/visible exhaustion, loss of appetite/weight loss, delusional thoughts/hallucinations, poor hygiene, excessively late for work, and various other causes for concern since she's began smoking regularly. She's in the middle of grad school right now and has an internship working as a counselor herself with clients shes solely responsible for.

She's been incredibly distant of late and has began a variety of risk-taking behaviors. Any time we are together, she's basically a walking zombie. I have no problem with casual and responsible marijuana use, but its all she talks about and seems to be taking over her life. She has been through a phase with heavy marijuana use a few years ago during summer break while not working, but she had very few symptoms at that time(compared to now) besides some risk-taking behavior and mild depression. She came out of that pretty easily once classes started and after we had a few talks.  

I've been struggling to make any progress with her these past few months. She refuses to acknowledge her marijuana use may potentially be causing an interaction with her medication or her existing neurochemical imbalance. What's the appropriate way to approach this?
<bot>: GF has started smoking weed to deal with her issues, now has a plethora of far more severe issues and refuses to acknowledge weed may be the problem.