Lyric discussion by livesX4Xmusic 

Cover art for Smile lyrics by Armchair Cynics

i love the "sometimes i worry about the things i cannot control" part. shivers yup.

so basically i think it's about this guys who's trying to get over this girl who just broke up with him, but he keeps finding these notes, most likely from her, and then he sees her and starts to get all depressed wishing they could be back together. but she's completely unaffected by the whole thing, hence the smile and walk away part. that's what she's doing, making it seem so easy but he's still suffering and wishing that maybe she could just pretend to be a little bit hurt to make it easier on him.