Girl's Behavior

Why does my friend treat me different than her other friends?

So, I (21m) have a friend (20f). We’ve been friends for a while. Recently, I discovered her Instagram account. I started to notice how, when she would interact in the comments of her posts with her friends, it was drastically different from the way she talked to me. When she’s interacted with me she’s always very polite, well-mannered, sweet, kind, and shy. I’ve also never heard her swear in my life. Even her grammar was spot on with me. With her other friends, I’m noticing a lot of swearing, not as shy, not necessarily caring about grammar, as well as a lot more abbreviations. She’s also a lot more blunt. Even in some of her video clips/pictures it doesn’t line up with what I’ve seen from her directly. It doesn’t even seem like she’s the same girl that I know and have known for years. I’m kinda confused on why she would treat me so different. One more thing I feel I should mention is that not too long after I followed her on Instagram, she blocked me. However, we’ve hung out in person since then and have communicated through other means and everything’s been good. I can’t really figure out why she would block me on Instagram either.
Why does my friend treat me different than her other friends?
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