My friend is depressed, bi and suicidal and I don't know what to do?

i'm sorry bud. what i would do is tell her parents teacher and my parents. i would also talk to her about how this is affecting you. bc as a friend you both should be looking out for each other. and if that doens't work then you really should cut ties. you can't blame your self for the misfourtune of others. at the end of the day it's their life their decision. you seem very caring and kind. and very mature ( in a good way) so was i at 13. but honestly talk to her about this and how you feel starting with " i feel blank when you blank) i know its childish but "I messages" do work. if all else falls hen really cut ties. good luck =)