DancingRedFeather, you asked 'do you believe that when you die you go to heaven?' I'm not sure if the question is meant to be answered in a specific or general sense, so I will answer it in both. I know that when I die, I'm going to heaven. My assurance is because of my trust in Christ Jesus, who is my Saviour. That answer may sound arrogant and presumptous, perhaps even to those who are also Christians, but I have settled the issue in my mind once and for all. I trust in the righteousness of Christ alone and no longer in my own. His righteousness has become mine. His death has repleced mine. And His place in heaven has guaranteed me a place as well. I am heaven-bound because Jesus Christ is the only one in whom I have placed my trust.
Now to answer your question from a general perspective, when you die you do go to heaven, if you have placed your trust in Jesus the Christ. For He is the way, the only way, into Heaven.
Life after death is a reality for every person, whether we believe it or not. The sky is not blue because we believe it is. It is blue whether we believe it or not. Likewise, whether we believe in life after death or not, it will find each of us in the end. And we will either have eternal life with God or eternal suffering without Him.