The struggles of dealing with false friends, backstabbers, and troublemakers make me think of movies such as 'Mean Girls' and 'Cruel Intentions.' These struggles could balloon into large problems.

Clip from the movie 'Mean Girls':
https://youtu.be/re5veV2F7eY

True character revealed in the movie 'Cruel Intentions':

http://www.youtube.com/watch?v=_AGhqOkUphU