Most Helpful Guy
You click your start menu.
Then you go to the Control Panel.
Search for the "Love Settings"
Click the "Advanced" tab.
Then you click to the "Emotions Manager" button.
Within there you should see a list of people you've loved.
Now what you want to do is click the "romantic interest" tab and set the value of the person you don't want to love to 0.
Restart your OS , and that someone should be unloved.