What would you do at a time like this?

i went back2 my country, Bangladesh this summer after 5 years, and everyone was doing fine. we had a lot of fun. then i came back when school started, and found out my grandfather had 2 go 2 rehab 4 cancer. i saw he had been fine, when i visited him in my country, but now, he isreally sick, dying:( i am soooo sad and scared that i will never see him again......it costs a LOT of money 2 travel overseas, and my family is in a crucial time now....so, i am praying and hoping that he will get better, and i will b able 2 see him again. we are really close, me and my grandfater, so i feel REALLY bad......why? i feel like asking god.