Why would she follow me after so long?

There was this girl I was kinda friends with like two years ago but I think she moved schools or whatever bc I haven't seen her since. We followed each other on ig back then but recently (like a year or few months ago) she unfollowed me and A LOT of other people. I never bothered to unfollow as I'm not on social media that much but yesterday I randomly got a follow request and it was her. It kinda just took me aback because I haven't even seen or talked to her in so long, why would she just follow me again lol? It's kinda odd, no?

Anyway, I'm not too pressed about it lol, just wanted to discuss it.

Why would she follow me after so long?
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