sure I can tell you some I know this is late though!!

yeah in the beggining of the show Casey is dating Evan, who is Cappie's EX best friend as you probbly know. But Casey used to date Cappie but well that didn't last because of Evan I think(??)

so in the first season Cappie is like pineing over
Casey and enemy with Evan. Casey and Evan then break up because she kissed Cappie in one episode. Cappie then starts seeing Rebecca and this makes Casey jealous. Well I'm sure you've already seen that by now. Well ask if you wanna know something.