We have been best friends so long but now someone ruined it! what do i do?

okk so if your friend doesnt like the other girl either and wont say any thing the just tell your friend that when you guys make plans and hangout just dont tell the other annoying girl about it, soo if the other doesnt know she cant follow and do anything with you guys and you can have so caughting up to do:) so you guys can hangout without a follower and no one gets their feelings hurt