October Month Lyrics
They grow closer when I sleep
And the ceiling falls
When I try to stand up on my feet
But they disappear when I breathe
There are plenty of floors
But they can't hold me
How hard can it be?
Do all adventures have an end?
Every waking hour
I long to bring him back again
I make-believe I'm somewhere bound
Wear my best perfume
Fooling everyone around
I'm not what I seem
Watching and no-one can tell
Had I only known
That these walls were just my own

She's complaining about being distant and locked away from everything, not having a place. She's closed in by walls, all her options disappear (doors) and yet she can't stay grounded as well (floors/but they can't hold me).
She then goes on about all good things coming to an end, maybe she's talking about a relationship there? (I long to bring him back again)
So she puts on a kind of fake persona to hide how she feels about this, nobody really understands where she's at right now (fooling everyone around/I'm not what I seem) - but, inevitably, it's revealed that her distance from others is caused only by herself, as in 'these walls were just my own'.

On another note, this song is surprisingly close to Miyuki/Eve's situation in Ai Yazawa's manga 'Kagen no Tsuki'. >_>