She did not come out with me on Sunday which made me angry as she had committed to come along with me. Next day she had called me and I did not answer the call. Later we talked and she said she hates for not answering her call and then after its been 4 days since she spoke to me.. what does that mean.. she hates me really? What should I do now

I think (not trying to be mean) but I think that both of you over reacted... Call her or text her... just get ahold of her:) Talk to her about it just be really nice and in return she will be:) Tell her you don't want to lose her and nice stuff like that! :)

Hate is a strong word. Either she has some issues or she's just being dramatic, but she sure doesn't hate you for not answering her call, oh please. Just talk to her, tell her how you feel. You'll never make it with this girl if you can't communicate.