Crystal,
I am sorry to hear of your trials. I think that you need to learn to be yourself around your family and not be the "strong" one. You are facing a great trial and honesty with your loved ones will help them see that you do deeply care for them. There will be good times and bad times but the love that is shared is what will be remembered. Even crying together can have a soul healing power. Celebrate each precious moment that you can and cherish even the pain because both help us to remember that we are alive.
Know most of all that even death is only a momentary experience from which we pass and will soon be changed into a new experience. I, as a Christian, believe that we will be translated into the presence of God and will await the return of the Lord. While it is sad to loose someone, knowing that those who die in the Lord are blessed helps us to know that God is caring for their life even when that life leaves the body.
God Bless,
Marlin