You've been suffering from the Hanahaki disease meaning you cough up petals because of onesided love. the reason you got this was that you fell in love with the player boy Kev.

You had feelings for him for a long time. How dumb right? liking someone knowing that you can't get them. But on the other side, Kev actually liked you. At the moment you are at school for lunch you are starting to cough. the terrible painful feeling in your throat. Kev noticed you coughing "Are you okay?.."