Why Would a Girl Unfollow and Remove Someone on Instagram?

Last semester at university, I was very close with someone from my class. We got along extremely well, spent a lot of time together, and had long conversations for hours. However, without any argument or conflict, she suddenly unfollowed me on Instagram during the second week of this semester. She didn't unfollow anyone else just me.

Do you think this was an emotional reaction, or did she completely lose interest? What could be the most likely reason for a girl to do something like this? Could she have been expecting something from me, and my inaction triggered it?

Why Would a Girl Unfollow and Remove Someone on Instagram?
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