Why I want to kill myself?

As I said in previous post, I hate my life. There is no point in that. Whole life is just: born, study, work and death. As I noticed, happy people, who prefer dont think about that are so stupid, that I am surprised they lived to their age. I think I am stupid, but not like that. I hate myself, but I hate other people(except my gf) more. Somebody just shit me up, and I am now need to study, work and spend money on useless things. Suicide is not an exit, because there is no exit. You are exist or not. Yea, i like music, writing text in acme, but it is not worth this suffering. The main problem is that I am from normal family, I dont know whats wrong with me. I hope you will never feel what I feel usually. Remember, life is useless, YOUR life is useless. There is no thing to live for. Do with this information what you want.