What does it mean if your friend acts distant but still follows you on social media?

Maybe I'm overthinking, but my friend has been acting a bit distant lately. But she said, a few days ago, that "everything is fine" and that she had just been "busy" for X reason. Maybe it's true, maybe it isn't, but she's acting distant. She now takes a few days to reply, and she once left me on read (that was before she told me that "everything is fine").

But she's still following me. Why is that? If she were mad or didn't want to hear from me anymore, she'd unfollow me, right? She has unfollowed like 35 people recently, but not me (and I'm quite recent on her following list)? Why? Does she still care about me/want me in her life
What does it mean if your friend acts distant but still follows you on social media?
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