Q - How can we enjoy heaven with loved ones in hell?

A - Because God will fix it so it doesn't hurt.

God's Word foretells that the Lord will wipe away all tears and sorrow for Believers -- that all the things of the past, sinful world will no longer cause us sorrow.

Some infer from this that all memories that are painful - such as knowledge that we have family and friends, who are suffering eternal damnation because of their rejection of Salvation through God's son, Jesus Christ, will be erased. I believe they will no longer hurt or we will have the ability to see beyond them and be happy in a way we can't understand right now, it's difficult to understand how these things will work in the Heavenly dimension.

A primary Scripture for this Truth is the following:

"And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away." (Rev. 21: 4)

I believe this does not mean we will lose all memories and forget who we are and where we came from, if we can't remember where we came from then we can't appreciate where we are and what Jesus did for us.

Without our memories we would not be ourselves we would just be like some robot or mindless drone and God doesn't want that, he wants people that truly love him because they want to and not because he puts some spell on them.

The Bible says we will have new bodies like unto the Angels and like the body of Christ, many do not stop to think that with that new body we will also have a new mind, and I believe that our new mind will have abilities not only to see what we have and be more happier then we could ever imagine but we will also be able to communicate with each other and Jesus mind to mind, and we may also be able to many other amazing thing with just thought.

Again I will say we can't fully understand how this will work but it will and we will be happy and still be ourselves.