Back in older times, there was a Latin phrase they would write on the top of a document. It was memento mori. It means, "Think of death."
You say, "That is so morbid." It actually is not. It was a reminder to be aware of the fact that life ends. Be aware of the fact that eternity is close. Be aware of the fact that there is an afterlife.
It is not a bad thing to think about these things deeply. In fact, it was C. S. Lewis who said, "A continual looking forward to the eternal world is not . . . a form of escapism or wishful thinking, but one of the things a Christian is meant to do." You should think about death, eternity, and the afterlife.
If you are a Christian, you are going to enter Heaven in one of two ways: either through death or through the rapture. Either we will die, or the Lord will catch us up to meet Him in the air.
Imagine being part of the rapture. One day you might be walking on the street, thinking about a loved one who has gone to be with the Lord. Maybe you are thinking about your last conversation with them, or wondering what they are experiencing there in Heaven. Suddenly, in the twinkling of an eye, you will be with them.
Mothers and fathers reunited with sons and daughters. Husbands reunited with wives. Siblings with siblings. Friends with friends. Your sorrow vanishes and it is replaced by ecstatic joy. Not only are you with your loved one again, but best of all you are with Jesus.
For the Christian, thinking about the afterlife is not a bad thing. It is actually a good thing. So go ahead and think about it. Go ahead and dream about it. Go ahead and wonder about it. It is called being heavenly minded.