She became silent. There were no longer any words to describe the absence of emotion within her heart. She went from arguing to being upset, now feeling nothing at all. She became silent because you were no longer worth fighting for.
They say love is blind. I disagree. Infatuation is blind. Love is all-seeing and accepting. Love is seeing the flaws and blemishes and accepting them. Love is accepting the bad habits and mannerisms, and working around them.