afraid of losing the person i dream to be with all my life..

my husband joseph was diagnosed having Germ Cell Tumor last February 2011...
his 28, i am 30 and our daughter 6 months old...we just started our dream family, he is working and i have our school supply store infront of our so called home... when suddenly this Cancer intercept our dreams of having simple and happy family...
he finished 19 session of radio therapy and 8 cycle of chemo therapy. and another 2 cycle of chemo on the secondline.
he just finished his 2nd cycle of chemo (secondline) last may 30, his now on recovery stage from chemo therapy. what makes me sick is that i can't do anythings to relieve the pain his suffering right now... as we talk last night, he told me that he suffered enough and he doesn't want to continue the treatment. he's already tired of the treatment after all he'll die soon... hearing it from him scare me. i afraid of losing him. i don't want to lose the person i dream to be with all my life... the father of my daughter