Two interesting quotes:

From Jonathan Edwards’ paper “The End of the Wicked Contemplated by the Righteous” (http://www.biblebb.com/files/edwards/contemplated.htm).

“It is now our duty to love all men, though they are wicked; but it will not be a duty to love wicked men hereafter. Christ, by many precepts in his word, hath made it our duty to love all men. We are commanded to love wicked men, and our enemies and persecutors. But this command doth not extend to the saints in glory, with respect to the damned in hell…

“…The saints in glory will know, concerning the damned in hell that God never loved them, but that he hates them, and will be forever hated of God. This hatred of God will be fully declared to them; they will see it, and will see the fruits of it in their misery. Therefore, when God has thus declared his hatred of the damned, and the saints see it, it will be no way becoming in the saints to love them, nor to mourn over them…

“…The saints will know that it is the will of God the wicked should he miserable to all eternity. It will therefore cease to be their duty any more to seek their salvation, or to be concerned about their misery. On the other hand, it will be their duty to rejoice in the will and glory of God…. God glorifies himself in the eternal damnation of the ungodly men…. The saints in heaven will be perfect in their love to God: their hearts will be all a flame of love to God, and therefore they will greatly value the glory of God, and will exceedingly delight in seeing him glorified.….The glory of God will in their esteem be of greater consequence, than the welfare of thousands and millions of souls…

“…The vengeance inflicted on many of the wicked will be a manifestation of God’s love to the saints…. When the saints in glory, therefore, shall see the doleful state of the damned, how will this heighten their sense of the blessedness of their own state, so exceedingly different from it! When they shall see how miserable others of their fellow creatures are, who were naturally in the same circumstances with themselves; when they shall see the smoke of their torment, and the raging of the flames of their burning, and hear their dolorous shrieks and cries, and consider that they in the mean time are in the most blissful state, and shall surely be in it to all eternity; how will they rejoice!…

“…You who have godly parents, who in this world have tenderly loved you, who were wont to look upon your welfare as their own, and were wont to be grieved for you when anything calamitous befell you in this world, and especially were greatly concerned for the good of your souls…. When they shall see you turned away and beginning to enter into the great furnace, and shall see how you shrink at it, and hear how you shriek and cry out; yet they will not be at all grieved for you, but at the same time you will hear from them renewed praises and hallelujahs for the true and righteous judgments of God, in so dealing with you…. And the Judge shall execute the more terrible wrath upon you on this account, that you have made no better improvement of your parents' instructions, they will joyfully praise God for it. After they shall have seen you lie in hell thousands of years, and your torment shall yet continue without any rest, day or night; they will not begin to pity you then; they will praise God, that his justice appears in the eternity of your misery.”

And then Randy Alcorn (http://www.epm.org/resources/2010/Mar/26/if-our-loved-ones-are-hell-wont-spoil-heaven/):

“…in a sense none of our loved ones will be in Hell—only some whom we once loved. Our love for our companions in Heaven will be directly linked to God, the central object of our love. We will see him in them. We will not love those in Hell because when we see Jesus as he is, we will love only—and will only want to love—whoever and whatever pleases and glorifies and reflects him. What we loved in those who died without Christ was God’s beauty we once saw in them. When God forever withdraws from them, I think they’ll no longer bear his image and no longer reflect his beauty. Although they will be the same people, without God they’ll be stripped of all the qualities we loved. Therefore, paradoxically, in a sense they will not be the people we loved.”