Coping with a "known" soon death. Please help.?

Im seventeen. Since the day I was born I have lived with my grandmother. Over the years we have grown so close. I love her so much, and can't imagin what life would be like without her. In november she was diagnosed with lung cancer. She spent most of novemember and almost all of decemeber including xmas and new years in the hospiable where I live. A few days before xmas she got transfered to a hospitable to far away so we were unable to visit over the holidays. She had family with her though. At the begging of January the cancer doctor gave her "month, months" meaning.. 1 to 2 months at the most. There were no treatment options due to the fact that they said shes had it for over a year. Doctors just kept diagnosing her with other problems. I always knew this time would come but its really hard seeing her become weaker and weaker each and everyday now that shes home. She gets worse everyday but is trying to stay strong. We are all doing the best we can for her. I go to bed everynight and wake up every morning praying today won't be the day. I am finding very hard coping and accepting this change. Im just looking for some advice, and other peoples experinces to make handling this situation better. I know people suggest telling them how much they mean to us, but I could not talk to her about such a sensitive subject with out bursting into tears. I know she already knows, and does not expect that. Anything would help. Thanks so much.