ppl take for granted with what they have

im fucken pissed....i came back sweaty from soccer, open up the letter box, bills as usual, its my sister's line which i pay for monthly, cos she wanted a handphone so much....the previous months were fine...but this time round, a whooping 89bucks...im so fucken piss.....i told her off, shes going to pay that bill with her savings and im going to terminate the line if the contract ended.....the huge bill was cos of downloads and hotlines...i dunno wtf she did till it totalled up to 89bucks....ppl tend to take advantage of me when im nice to them....im so fucken pissed off....why is it so nice to take things for granted?......urrgh!