Lyric discussion by ravenna731 

Cover art for Drowning Lessons lyrics by My Chemical Romance

"Imaginary wedding gown That you can't wear in front of me"

I'm pretty sure it's "imagining a wedding gown that you can't wear in front of me". That is a reference to the fact that, traditionally, grooms aren't supposed to see their brides in their gowns before the ceremony (it's bad luck for the marriage).