"I hope I’m going to heaven when I die."

Of all the things that you should be sure of, it’s your eternal destiny. To say "I hope I’m going to heaven" is like standing at the open door of a plane 25,000 feet in the air and, when asked "Have you got your parachute on?" answering with "I hope so." You want to know so— and you can, simply by obeying the gospel. If you repent and place your faith in Jesus Christ, He will give you eternal life and you can know that your eternity is secure. These verses also make clear that those who refuse to trust in the Son of God can likewise know that they do not have eternal life—they will remain dead in their sins.