How do I breathe.

It feels so different being here, I was so used to being next to you.
Life for me is not the same, there's no one to talk to.
I don't know why I let it go too far, starting over it's so hard.
Seems like everywhere I try to go I keep thinking of you.
How will I see when your love brought me to the light?
Where do I go when you heart's where I lay my head?
When you're not with me, how do I breathe?
I'm losing my mind, yes I made a mistake.
I thought that you would be mine, guess the joke was on me.
I miss you so bad I can't sleep, I wish I knew where you could be.
Another girl is replacing me, god this can't be happening.
You made it hard to breathe when you're not with me.