I'm thankful you want to make sure you will go to heaven when you die, because no matter how short or long your life turns out to be, some day you will die -- and then it will be too late. The Bible warns, "How shall we escape if we ignore such a great salvation?" (Hebrews 2:3).
What does it mean to commit your life to Jesus Christ? Let me illustrate it this way. I notice from your letter that you are married. What exactly happened when you said, "I do"? Before then, you undoubtedly believed you truly loved your future husband, and that he loved you. But something happened during your wedding ceremony: You both made a vow to be committed to each other for the rest of your lives. You no longer just believed you loved each other -- you now were committed to each other.
The same is true when we come to Jesus Christ. We may believe He existed; we may even believe He gave His life for us to purchase our salvation. But something else needs to take place: We need to commit our lives to Him -- to trust Him completely as our Savior, and vow to follow Him as our Lord.
No matter what the future holds for you, my prayer is that you will turn to Jesus and commit your life -- totally and completely -- to Him. The Bible's promise is true: "The gift of God is eternal life in Christ Jesus our Lord" (Romans 6:23).