Why am i so stupid ? dumb . dont know nothing bla bla bla?

[Sakura]

i know a thing that my friend already knew long time ago.just found out today about grade to pass a subject at least D and above n i thought it was B n above.so i wrong.i got b- in a subject. registered the subject already n 2 weeks later just found out bout the rule for passing that subject.y am i so dumb.dont know nothing.so fc*n stupid.ugh!!!! just stupid gdmmit