I can't stop crying

Dad is not doing well...He is losing weight, can't eat, very tired, he's using a cane and the pain is getting worse. He found out today that the PSA level is at 77 which two months ago it was at 3 - this means the treatment is no longer working - which explains how he's been feeling. They are working on scheduling more tests and then will look into if there's anything they can do for him...chemo...etc It is so hard to be around him now and watch him age so rapidly. I'm not handling this well...