Definite GO.
It has it all: drama, romance (cliche, but still good), and comedy! Plus, Joseph and Seth are in it, so double plus. It gives perspective on a serious topic, while making it so you're not bawling your eyes out and pitying the character. It sends a good message that while cancer is real, sadness is only an emotion and one should remember that there are many other emotions in the spectrum during hard times.