Hi, this is one the most beautiful songs in the world!
I think this is how It goes:

C(332010)
F(033210)
Am(002210)

F              C               F   CFC  F                  C         F C
I like you when you're sad ain't weird to discover that 
F               C                FCFC    AmAmAm
I like you when you're sad

This goes on and on and on....

Enjoy!