Why she reacted this way?

At the beginning of the school year, this girl sat next to me and became talked to me and we became more and more friendly by days but suddenly 1 day she became ignoring me, she was still talking me to other peoples tho, she even changed place to go to the empty desk infront of us.., why it happened, females of g@g, why could u reacts this way?

Why she reacted this way?
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