Why does my girlfriend hate me all of a sudden?

may be its something you did.

It is hard to say, but the first thing that comes to mind is that she is upset with something that you did or something that you did not do. Try to talk to her .

Maybe it was something you did that reminded her of a bad past experience in her life, or maybe she has some issues of her own. Try to be in her shoes and open a honest discussion about both of your feelings. How her attitude makes you feel and ask her why she feels the way she does.

You should ask her what's wrong. If she doesn't reply just give her time to cool off. Perhaps she just needs some space right now. You're probably very confused but there most be a good explanation for it.

Hate between emotionally involved parties do not start at once, or to say "all of a sudden". Every tension increases by a certain rate, and if the communication quality is not good, it forms a buildup of resentment and sorrow that eventually turns into a major frustration in either party and then we say "My girlfriend/boyfriend started to hate me all of a sudden." What should be done is, building a healthy and comprehensive basis of communication. It will help the situation from erupting at once greatly.

Simple solution - just ask her! After listening to her, evaluate if there are genuine reasons and see if you can work on them. If you find the reasons shallow, discuss it with her.

Maybe she just had a worse day or there is something she struggles with, just talk with her about it.

I'm not sure "hate" is the word preferable for this. Maybe she needs space and could be going through something. Try asking her if she's okay... If she snaps if her space and tell her that you'll always be there for her and that if she's going through something she should feel free to talk to you. Or maybe you did something to anger her ask her if you're the problem and the Two of you should talk and figure out the next steps to your relationship.

Sometimes its not hate what she might feel. Its resentment. For some people its hard to express their feeling and they come off as hateful with out noticing. You might want to sit down and talk. That works for me a whole lot. Goodluck!!

it is good that you speak to her and understand what is making her hate you.maybe she is not even hating you but going through something and failing to hold on that she is hating everything around and its not about you