What an "x" is good for (sonnet)

To him it's still a game of cat and mouse,
He wonders what will work to bait the hook.
Well I won't let him back into my house,
Not even for one tiny, little look.
My days of feeling hurt are so long gone,
The childish things he says don't bother me.
There're actually some mem'ries that are fond,
I don't hate him; just wish he'd leave me be.
I have another man who treats me right,
Respects me for the woman that I am,
Who doesn't live to name call, scream, or fight,
Knows how to be a perfect gentleman.
There's only one thing an "x" is good for --
Spelling the word that helps you find the door.