i'm going to kill my flatmates- they are driving me crazy!

they are so inconsiderate of other people- and b/c we're best friends they always take me for granted... its so annoying! its like-they both just act like they are the most important people in the world- liek i'm not tired or hungry or wahtever... its complaining constantly- and any time i make a comment- i get attacked for it- i'm just sick of their crap.... grrr.. i don't even know how to approach them about all this stuff b/c it would prob just cause a bigger fight.... i'm so irritated....