Girls, Why she hates me now?

I met her in class and we are preparing for same exam and eventually became good friends and 3 months almost talking daily.

I started to like her a lot then after 3 months I proposed her on chat.

She replied after 10 minutes of seeing message and told me to focus on exam and they are near and I am not like this type of girl. I accepted it, but next day she started to act she can't tolerate my presence in room and hating on me. We used to come home together she changed route completely. I was already planning to not to talk to her, but I don't think I deserve this much hate.

Why she did this? She really hated me now.

Girls, Why she hates me now?
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