I think. He loves this person, but knows they can't be together. He wants to run back to what's familiar to him, but is trying to get through it. (You make me wanna run till I find you). He's tired of trying to pretend everything's ok when it's not. (Half the time the world is ending; Truth is I am done pretending). The relationship/this person changed who he was, pushed him to be a better person, but it doesn't change the fact that he's sad about losing them. It's like he's saying look at me, I'm actually surviving. (I never thought that I had anymore to give; You're pushing me so far; Here I am without you) But their memory is still there no matter where he goes (I find a place where we escape; Take you with me for the space) He's going to celebrate the good times they had and move on, but he'll always love them (Drink to all that we have lost, Mistakes we have made, Everything will change, But love remains the same). Beautiful, Sorry for your loss--I recently lost my dad, the song makes me think of him too. :)