Lyric discussion by MichaelHutcheon 

Cover art for One For The Road lyrics by Funeral for a Friend

Based on what people have said on the previous songs on the album, I think this song is from two different perspectives:

One being that of the husband who has been rescued and the other of the wife who was waited at home. Neither know where their relationship stands and whether things will still be the same when he arrives home.

Can't be sure though, so don't quote me on it. Just a guess. :)