Airborne Toxic Event - Changing Lyrics Meaning

i think it's about a couple and the dude asked to move in with his girlfriend "i am a gentlemen,didn't i ask for a place i can stay" and things don't work out the way he thought it would because they start to reveal who they really are to each other "the next part just got in the way what were we both thinking" .that's why she keeps saying he's changing when he is really being himself. after a while they start to resent and avoid each other "the days they turn into weeks when we don't even speak we just lay wide awake and pretend were asleep"