Lyric discussion by killerv 

Cover art for Smile lyrics by David Gilmour

I think its about a guy whos on the fence about leaving his love. He's pretty sure the relationship is over and figured the easiest thing is just for him to leave. I think he has put forth an effort to make things work but she just won't come around. She probably gives him a bunch of sh*t and he figures the only she'll be happy is if he leaves.