My girlfriend is terrified of finding someone else, does that mean she never really loved me and is actively looking for someone else?

My girlfriend keeps telling me how scared she is that she will find someone else. In my mind, if she's thinking this then does she really want me? If she were to find someone else does that mean that she never truly loved me? She's always been scared of finding someone else, I just thought that she only wanted me and that finding someone else would never be a thought or concern.
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We broke up 6 months ago, I'm so much happier now and I've met someone new
My girlfriend is terrified of finding someone else, does that mean she never really loved me and is actively looking for someone else?
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