Daily struggles

What do you say when you know the time for words has long since passed? But you didn't know then what you know now. Sorry just doesn't seem to suffice. I have a problem with leaving words unsaid. I struggle to get out of my head.  Out there, silence is my only company. The screaming voices in my head make sure I'm never lonely. It's always the same old regret, I mean song. They both sound the same.