Girls, How can I tell if a shy girl is obsessed with me?

Anonymous
So, I know this girl who is a freshman when I'm a sophomore who seems to like me. She looks at me whenever she gets the chance. Sometimes wherever I go she's always in the same vicinity as I am. And I know she has friends that aren't really nice to me. She interacts with everyone else except me and seems to be quite an introvert. I wasn't sure if she liked me or not and I was suspicious.
Girls, How can I tell if a shy girl is obsessed with me?
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