i had a cat with cancer too. we had to put it down because it was too late to do anything and we didnt want it to suffer. it sucks, but you have to accept it, so love your cat while you still can!
I had to go to my moms today (my parents are divorced) and I wont see her until tommorow :C
Although my dad says shes been eating and drinking again, so thats a good sign.