I agree that she seems like a fundamentally nice person who is deeply insecure. I also wonder if classmates found her social media presence/persona quite off-putting. Personally, I find it all quite contrived (the use of 'divas' every other sentence etc.) so if she's actually like that in real life, I can see why people might keep her at arms length.
I was surprised to hear she wants to be an actress. I know loads of major Hollywood stars have had surgery but a facelift can't be good for acting, especially so young.