Lyric discussion by Rutuboi 

Cover art for Hannah Hunt lyrics by Vampire Weekend

I don't think this is necessarily about a break-up.

It's obviously about a couple or two friends who live outside the society. They travel across the country, possibly on the run from something, and sleep next to a campfire.

Hannah seems to be faltering, and conforming to her old life, wishing she could just forget their life philosophy and live a normal life with a job and a house and everything. Hence:

"Damn it Hannah if I can't trust you.."

Ezra Koenig has apparently stated that the narrator in this song could be the same narrator as in their song "Run", which depicts the pains of living with a dull job and an average life. The narrator in that songs dreams about "running away", so this could be the story of that escape from society.

A lot of room for interpretation here though, and I think it's cool how everyone can find their own way of seeing it. Great song.

My Interpretation