My advise would be to treat her as an adult while she is acting out like a child. Just tell her you are willing to give her all the space she needs to re-evaluate her life...so it would be better if she can go away...but that she needs to STAY away until she has figured it out. Be strong. This will speed up change...hopefully for better. I think she loves you, just is gotten confused and like a child, thinks she can have it both ways -but this is obviously hurting the relationship. Good luck!