Why did this girl unfollow me and remove me as a follower?

yesterday i posted something (it was a selfie) and this girl liked my picture and even commented “😍😍” on my picture and liked my story. i don’t spam on my story or post too much— actually i barely post lol, i’d say i post one time every two months. and i post one or two stories every week (maximum). i even commented on her last pic “ur so pretty”, and i don’t post political content or anything that could trigger her. today i checked and she removed me as a follower, and unfollowed me (she didn’t block me). i do certainly follow political accounts and stuff like that but i never make public my opinion on absolutely nothing about politics or something controversial.
so why is this? it’s not the first time that happens to me; just curious.

Why did this girl unfollow me and remove me as a follower?
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