In my Father's house are many mansions. I am going there to prepare a place for you, and if I go, I will come back to take you there to be with me forever. According to one Bible scholar, there are some 1,845 references to Christ's coming back to earth that are recorded in the Old Testament and 318 in the New Testament. There are many more references about heaven and hell. And as Jesus said, he is right now preparing heaven for all Christians and will, when everything is ready, return to take them to be with him forever.
Nobody can prove that there is a heaven or a hell.
Neither can anybody prove there isn't. The evidence, however, confirms that there are both, and I know which side I'd rather be on. If I believe, I have nothing to lose and everything to gain. But if I don't believe, I have everything to lose and nothing to gain. The choice to believe or not to believe is each individual's decision.