Stuck because of you

When Brianna was ten years old, her younger sister was diagnosed with an illness, her mum lost her job because of the time she took off work to take care of her sick daughter, and her dad was at the brink of losing his own job.
The only way Brianna could think of helping her parents was by begging the daughter of her dad's boss, 'Cara' to talk her father into letting her keep his job.
Cara agreed to help but on the condition that Brianna be her best friend , of course Brianna agreed how hard could being someone's best friend be.
What she didn't know was that Cara wasn't just someone, being Cara's best friend meant obeying Cara's orders no matter how selfish, unreasonable and stupid they were.
Now in high school, Brianna crosses paths with Samuel Russo, a handsome basketball player , sparks start to fly between them but Cara has to ruin it all by saying she likes Samuel .
What would Breanna do?
Read and find out.