What should i do?

Felt sad although today very happy that i pass some subject... He was very angry and i think if i made a mistake i could piss him off easily... Now resting my mind... Don't want to know anything... Feels like crying and want to find a place to hide myself or to lock myself up... Cold and sleepy now... What am i suppose to do? Really really really sad i now going to cry already... Tears going to round my eyes.... Seriously.. I know he is busy,i know he is tired,he having his exams but at least inform me... I won't even go and disturb him for what.... I felt that i am a failing girl.... :( haiz... What to do! What should i do? I want to at leat help him,but i couldn't cause i am not as smart as him...  Felt that i am so useless... :( perhaps i am not the girl for him? Have a lots of doubt... Is this what he feels? Don't feel like asking him,is not i don't have confident in him is i think i am totally a fail girl... Don't even think for him...