Why would this girl be worried about the fact that others will joke about her liking me and me finding out?

We are pretty close, she is a university mate, and she often would tease me, mock me, seek my company, ask about my zodiac sign, joke about the fact that we are not compatible, and bring up my hypothetical girlfriend (that I don't have).

Why would this girl be worried about the fact that others will joke about her liking me and me finding out?
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