Why i keep bLAMMing On myself?

Juz now ab 1am, he called me for help....and me juz rush to his place...juz try to see whether can give some help or not(even me not really good lar,coz long time din touch on those subject)!When reach there, juz ask ab wat mark did he get for last assignment(coz i hav help him some....),and he say very low....wahCao,i oso can't believe is very low....lar!Me can't really believe oso coz compare to others....(most are copied and still can get high mark compare to him, me oredi edited for him but yet get low mark)!He say he is no mood....,the moment he say he is no mood.......,my heart suddenly beating very fast....,i like feel tat i make some1 to get low mark.....even i try to help him!How come.......?Me dun really have mood at tat moment...even he din say wat ab me lar!But me juz think tat coz of me.....oh,tis feeling really unpleasant!!What shud i do.....?Dun care?Try to find some solution for him?Or.........haiz!hav to cont my revision liao......!!