How to get your girlfriend to hate or even just stop hanging out with her friend?

My girlfriend and me were getting along amazing until she started hanging out with this girl that she hadn't hung out with for over 2 years because (before they hung out again - she claimed she hated her) (after they hung out again - it was because they both were on probation at the same time for which she has been off of for over a year and a half). But now that she has to begun to hang out with this girl again this girl keeps putting my girlfriends life in danger. So I asked her not to hang out with her anymore and she started a fight saying I'm her boyfriend not her father and that if I wanted to control someones life then she'd give me a kid to do that for. Which ';A'; I don't want a kid until I'm married and ';B'; I'm not try to control her life I just wouldn't like her hanging out with this girl anymore since it creates numerous chance that she could die and then I would loose her for good. So all I'm asking is what can I do to separate her relationship with her so called friend because I love her dearly and would hate to loose her.How to get your girlfriend to hate or even just stop hanging out with her friend?
sry i don't no wat to say but if you LOVE her u gotta do wat you gotta do to save a life maybe even 2 (her and her friend)





hope it helps plezz awncer mine......