Can't I??

Hi,

sad 2 say but I am in pain n at the same time angry!! Jus nw i fought with my sister again over stupid things,den it went on n on I even promise myself nv 2 hit her again,but could not help myself n went on hitting her!! I hit her because,she close the door n I was jus nice tying 2 block the door,she shut the door against my hand!! Her room key is nw with mi,askin it back by throwing things at mi,y should I giv it back 2 her??

Can anyone jus tell mi hw not 2 fight with my sister so easy???? I really sumtimes cannot really take hold of myself!!