I think that Noah and Cash are going to be enemies because they are both friends with Justin but not friends with each other. They may not turn out to be enemies because they may change because Justin might push them to be friends.
Justin is not speaking to Noah much in the book and Justin is playing more with Cash so that may push Noah to not like Cash and maybe not like Justin. Cash is already making fun of Noah but Noah doesn’t know it. Justin is in the middle but is also in a fight with Noah so he may also be a part of the teasing(Justin is caring so he probably isn’t).
But aside from that I think that Noah and Cash will be enemies and leave Justin in the middle.