Why do my best friend acts different around me?

My friend act different when we hang out in private. They act more mature (I think) and they do be happy around me but sometimes they are quiet too and I have to do the talking (I'm introvert but they is extrovert)

But in public when I'm sometimes not around her, she'll act her usual self, like more excited, funny, giggly around them. I'm just confused and sad.. she used to act like this around me. Is she afraid to show her true self to me? Or don't want to be seen around me (or seen as friends in public/school)?

Do she hate me or something? Please don't tell me she is a fake friend!!! Maybe she is just shy around me for some reason, maybe because I'm shy around her ๐Ÿ˜‚

Note: we've been friends for about 4 months and we go to the same school. Sorry for my bad grammar ๐Ÿ˜…

Why do my best friend acts different around me?
Post Opinion