Why does my one night stand partner keep on stalking me everywhere?

Long story short. I met this girl on tinder and we had sex. She was fine and did text me after that night but then went silent for mysterious reason. After a few weeks she created a fake account but get caught because of her wording. She stopped for a while and kept on visiting my profile on other social apps that I've.
Why does my one night stand partner keep on stalking me everywhere?
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