Empty like the nail polish you throw away because it's 'empty' but it's not actually empty because there is still some product left in it but it's not useable because it's so dried out and close to the bottom that no one wants to try to use it so they throw it out.

Like me

So empty like how I have no energy to show any kind of emotion anymore but if you dig really deep you'll find some dried up old feelings but it's too deep in there that no one wants to try with me anymore so they just throw me out