Too little, too late

What did I do to make you so sad? I blame this on myself. I sit
here complaining meanwhile your feelings changing. You won't
talk, I can't sleep. The promise made I didn't keep. Look at the
mess that I am in. You can't undo mistakes like this. There's
really nothing I can do but try and make this up to you. You're
keeping your distance ignoring my existence. I hurt you, you're
upset, something that I cannot forget. Maybe I can't help it,
can't put an end to it. Sometimes the things we say are only
temporary. I can't undo what I've done to you.