Lyric discussion by Culley 

Cover art for Why lyrics by Secondhand Serenade

I should've known this wasn't real And fought it off and fought to feel What matters most? Everything That you feel while listening to every word that I sing. I promise you I will bring you home I will bring you home.

I think that means that he was pulling away from whoever he's singing to, and he realizes now, for some reason, how much he loves her and is trying to apologize for all the pain he caused her and whatnot. I think of "i should've known this wasn't real/and fought it off, fought to feel what matters most," as him fighting off the feeling of doubt he had at one point, to feel the love that was underneath it all.