Sometimes I hear a voice in my head that tells me negative things like everyone hates me or I should kill myself. What should I do?

You should talk to a therapist. You know yourself better than anyone else does. Only you can decide how serious this issue is.

Never look towards your negative side, negative is almost never good. Prove it wrong and show it you are worth a life :)

I'm so sorry you have to go through that. It is really hard to walk through people telling you bad things let alone your own head. You should seek help by calling suicide prevention hotline, based on your location just google "suicide prevention hotline". Or if you are currently going to school, try to talk to your guidance counsellor. It is free and confidential. They are professionals specifically trained to help you feel better. Again, I am really hear that you are experiencing this. I hope you fine help and feel better.

Figure out who your support group is: trusted friends, family members, school counselors, a doctor, and reach out to them with this information. Tell them, "Sometimes I hear a voice in my head that tells me negative things like everyone hates me or that I should kill myself. Can you help me? I really need some support." Those people who are really good for you will stick around and help you find the right treatment path. It is okay to find that path without a support group if you do not know many people! Reach out to a local therapist or an online therapist for support. Look at the self-help guides on 7cups and determine if one of them matches how you feel. I cannot tell you how you feel, but it sounds like you might be experiencing depression, which is treatable and can be recovered from.

Go to a specialist who can diagnose you properly then take the necessary steps they recommend. Try to reassure yourself and get support from the people in your life.

I understand that you'd be very afraid that this is happening to you. You are the best judge on what you are to do. I seems to me that you should contact someone who is an expert in this sort of thing (therapist, psychiatrist etc.) while trying to ignoring those negative things. Here's something positive from me: you are a strong person despite all this.

Focus on positive thoughts, remember the people you know love you and that there is always some-one here who can be there for you.

You should try to consult your parents about this, you could get professional help on it that a listener may not be able to provide

You should meet a therapist and talk to him about it. They are specialized people that would help you.

You should tell a trusted adult or health professional about it. You should take this seriously and tell someone as soon as possible.