"Because I love you."
You asked me why I kept following you, why I kept looking at you.
You asked me why I kept asking if you needed help. You asked me why I kept annoying you, why I kept caring for you even if I am in no place to be doing that.
You asked me why I kept smiling when I talk to you, why I cried when you were crying.
And the only thing I could say was
Because I love you.