This song...
It's "Here We Are" by the Phoenix Foundation. It plays after Alamein apologises to Boy and when he debates about going into the cemetery, and Rocky's watching him from a distance.
I think it's absolutely beautiful, but I can't find it anywhere on YouTube.
So, does anyone know where I can listen to it?
UPDATE:
Found it! You have to buy the full song and can only here a sample, but still! For anyone else:
http://www.amplifier.co.nz/release/58963/boy-movie-soundtrack.html