This girl is trying to steal my best friend

I have a bff that I've known for 5years and then another girl comes along and to me it seems that shes trying to steal my bff any help!!!

Well if you feel as though that she is you should talk to your bff and ask her whats going on. Ask her if she would stop being your Best Friend and become the other girls bff. A real bestfriend wouldnt let noone else break yall apart.