Lyric discussion by eucil 

Cover art for Gridlock Caravans lyrics by Death Cab for Cutie

This song feels like a rehab sort of emotion. It seems uphill, as per the lighting the cigarette backwards, delusions of things working out right etc. The friends part reminds me that the speaker has changed and can't get back to old friends because of the barrier caused by the rehab.

I don't really see why mentioning the word "heart" has to indicate love.