People often have a problem with the fact that so many people believe other things. Yet to me the mere fact that so many other people believe 'something' proves that the Bible is true. See we were created by God, and He put in our hearts a knowledge of eternity. We all know in our hearts that we will exist forever. People deny this, but I don't believe for a minute that any of them really believe that one day they will wake up and not exist, or should I say that one day they won't wake up and will cease to exist.
People know in their hearts that there has to be a being more powerful then themselves.
They search for God, but few find the real God of the universe. Many try to claim we are our own gods but that we don't realize it. You mentioned that you have thought of killing yourself. Let me ask you a question. This is a question you better answer before committing suicide.