Help a girl out! Pretty please! ;)?

Well me and all my friends r fighting! Idk what to do cuz we have been there 4eachother all the time! Well it all started cuz of this boy! Aka my bff ex boyfriend! I asked my bff if she had feelings 4 him after they broke up, she said no and it was ok for me and him to date! So then when I started hanging out with this girl kate she got mad cuz she said I used her to get 2 the dude! It isn't true! So my bff is mad cuz he asked me out! She is mad at me cuz I like him and today at school she said she still had feelings 4 him! All my friends say if I go out with him they won't talk to me again! And one girl is starting rumors! My other friend sam says to back off cuz her sis wants him! And now we r all fighting! What should Ido?