Fall Out Boy - Chicago Is So Two Years Ago Lyrics Meaning

"My heart is On My Sleeve, I wear it Like a bruise or black eye, my badge my witness, means that I believe, every single lie you said" This pretty much means, he shows how he's feeling, his heart is out there for everyone to see, and he got hurt because his girlfriend lied to him. "And every pane of glass that your pebbles tapped negates the things I went through to avoid you..." This means the girl would keep bothering him with the situation, even though he knew already and was trying to avoid the entire situation. "But there's a light on, in chicago, and I know I should be home, and all the colors of the streets signs, they remind me of that pickup truck out in front of your neighbors house" he's been out of town (touring possibly) and he knows he should be at home with his girlfriend, but she found a new person, her neighbor, which is why the pickup trucks at her neighbors house, she's cheating on him. "You want apologies, girl you might hold your breath, until your breathing stops forever" basically, she wants apologies for being left alone, even though she's the one who took advantage of the situation and left him angry. So he wants her to feel horrible or posisbly die.