What to do when your best friend gets mad at you because you have another friend and you talk to her more?

Why don't you tell your teacher or another teacher that you are in a fight with your friend and ask "may i please talk to my friend in the hall". You shouldn't try to talk to them at recess because they will run away. Just tell them that people can have other friends that they can hang out with. Just explain to her that you and ur friend are always gonna hang out and b friends.