Say what you will now because time just keeps on passing you by. If you want to say something, say it. If the urge is there to react or respond, do it. As long as it's within the appropriate boundaries. I know that might sound a bit conformist, but well, sometimes we have to play by society's rules......but...words can break the boundaries of conformity and norms.
And smile. Smile even when you think you shouldn't.