Why does my girlfriend hate me all of a sudden?

There could be a sudden change in your relationship that she doesn't like. Or she might have a personal fear or regret towards something in the relationship.

Have you done anything to make her angry? If the answer is simply "I don't know it's weird", then maybe it's time to ask her. Going up to her and saying "Why do you hate me all of a sudden" is sure to make her defensive and get even more annoyed. So perhaps trying to give her a little extra care and love than normal while asking some sort of question such as "Is everything okay?" or "How are you doing?" will make her answer your questions.

Women are controlled to some extent by estrogen, she might just hate the way she is feeling and sometimes women are moody -its part of riding the estrogen horse

It is possible that she may have become uninterested and have problems in her own life that she needs to deal with. Never blame yourself unless you did something to make her mad. Just kidding, NEVER blame yourself for your significant other suddenly hating you.

Maybe you should talk to your girlfriend. She may be experiencing a difficult time right now and just doesn't know how to express herself positively. Or maybe she just isn't interested in the relationship anymore and its time for you to get yourself out of that situation.

I think if it does happen, the first think to do is to communicate with her. Otherwise, you will try to guess without really knowing what happen. Communication is the key in all relationship. She might hate you because she has some concerns about something and does not know how to talk to you about it.

Maybe your girlfriend found out something about you from someone you both know, or she seen you doing something you shouldn't be doing. It is also possible that she's going through something you may not know about.

She may not hate you, so much as your actions. Maybe you're doing something she doesn't like. Maybe you should try and sit down and talk to her,

Try to think of anything you could have done to upset her or is there has been any sort of change in either of you lives that might cause her to feel that way?

Do you actually know this or is this suspension you have made. We as humans tend to make small situations seem bigger. You need to actually talk to your girlfriend and confront her with these feelings.