I'm sick in the head and I think ending it might be best for everyone around me
Thats sad to hear. Why do you believe ending it would be best for everyone?
I guess because it'll make me happy.
Wanting to end your own life is a sign of being in a deep depression and is serious mental health issue. You should contact a mental health professional as soon as possible if you are feeling suicidal. There are many people in your life who love and support you and committing suicide will cause untold emotional harm to them.
It doesn't matter since I'm a burden anyways.
How does you being happy make your death best for everyone else? You shouldn't jut assume you're a burden without talking to other people first. Ultimately though you need professional help because it's possible to change with the right help.