hell is actually a waiting point. After the rapture, all of those in hell are sent into the lake of fire with satan, after 1000 years of life on earth with jesus christ erecting the capital in jerusalem, satan is allowed to tempt god's new children for one season, after that all of god's faithful create a new kingdom and jesus vanquishes satan to the lake of fire for all eternity.

And once you die, if you go to heaven(we actually don't go to heaven until after satan is permently sealed in the lake of fire, before that we are in a waiting point like hell, but much more luxiourious)you no longer miss those who will or are in hell. You understand that they had the same choise as you and they didn't do what they should have done. You might feel a twinge of regret, but not sorrow.