momijikun
I have a girl friend she might have cancer and if she dies I wont ever be happy again
crying well you can look at this in a few ways.
If she does die, instead of grieving her you can celebrate her life
If she doesn't have cancer, she'll be okay
and if she does. the doctors will do all they can to help her
All you can do is be there by her side through this whole thing. It will help her alot