Need help with Teen Daughter + Boyfriend who is ruining her future?

Dont push. I know first hand that it just makes them worse. As far as the doctor thing goes. I dont think there is any point in trying to make her go, As with other diseases (alchohol, drugs etc) if she isnt ready then there is no point. Maybe she needs this as a learning experience. The marijuana is probably the reason for the mood swings and irrational behavior. I would suggest letting this relationship hit rock bootom so she can see clearly, then let her come home. In the meantime, let her know you are there but there are limits to what you will do with her in this very dumb situation.