Why would anyone still cyber-stalk a person who have wronged and hurt them?

I have this one friend who really liked this one guy she talked to a year ago. The guy did not like her back but enjoyed the ego-boost she was giving him, so he kept breadcrumbing her. She knew all along that he was toying with her feelings but she was too attached to walk away. Eventually, she finally blocked him in January, thanks goodness. Few days ago, she told me she has been cyber-stalking that dude with a fake acc for the past two weeks and I'm just shocked. Like why wouldn't she just forget about him already

Why would anyone still cyber-stalk a person who have wronged and hurt them?
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