Prolonged eye contact, what does it mean?

So today this girl in my class, i sit across from her and at the end of class she started making prolonged eye contact with me for a at least 2 minutes until breaking it. she's donethis with me a lot in the past but she never talks to me so what can this mean? Im really confused, like does she like me or not
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My class had a party yesterday and she did not even speak to me, she just locked eyes at me and bopped her head and up and down
Prolonged eye contact, what does it mean?
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