She started sharing less stuff with Kaycee as for her she thought that having boyfriend so soon was not right , it would affect one's aims and goals and will also make them lack studies and Sarah was not ready for any attachments so she told Kaycee that she didn't want to disturb her personal life and hence was spending less time with her .
Kaycee didn't know what to say ,so she warned Charlie and started keeping distance as well and Charlie felt awkward ,he fell that only rights to know her was also taken away especially he was planning to meet Sarah through Kaycee.
Sarah shifted on rent in Kaycee's complex so they eat together , learned together ,played together both spent most of time at each others home and soon became best friend but never did Kaycee revealed about Charlie's feeling .She didn't hide on purpose but then as much she knew Sarah she came to know Sarah hated boys /male/ men as she thought they were most irresponsible and heartless people. She always wanted to prove herself better then a boy and that is why she wanted to do everything properly up to the point.
It was all past but not one day Sarah forgot about it.