Lyric discussion by USMCGirlFriend 

Cover art for Forever lyrics by Rascal Flatts

its about the military when the guy/girl is leaving for deployment Prayin', waitin' on you, To run back through that door, To the way it was before you left

It wasn't long enough It wasn't long enough together But it was long enough Yeah, it was long enough To last forever

she/he is waiting on their loved one to walk through the door