My best friend seems to hate me greatly nowadays...?

Not a very good friend! Ignore her, she's playing mind games with you. You deserve better. Confront her face to face and find out what is going on. I'd love to help more but i simply can't, the rest is up to you It happens in life some people have insecurity problems and must have attention and know that they can change someones mood single handed. If you don't talk about it you'll always be so worried, upset and confused :-)