"
for you, in your darkest times
I was there for you, in your darkest nights
But I wonder where were you?
When I was at my worst down on my knees
And you said you had my back
So I wonder where were you?
When all the roads
Hes explaining that he was there for this girl through her toughest times, day and night and he never left her side. And when he was at his worst she was no where to be found when he needed her. And when he wanted someone there to protect him, he didn't have her. The tone for this almost sounds like a mix of depressing and sad because she promised him all this and he did all this for him when she just stood him up.