Does death separate us from the people we love forever ? do we keep our human relations or do we start over ?
I'm looking for any scripture passages that backup this claim or the contrary.
TL;DR The answer seems to be a clear "Yes" on this matter.
David Legg has an excellent sermon on the subject here, from which I obtained much of this research.
Many people have heard the passage about there being no marriage in Heaven:
There is some evidence that persons will be recognizable even after they are in heaven. At the Mount of Transfiguration, the disciples with Jesus were able to recognize Moses and Elijah. Legg treats with the question of how the disciples were able to recognize figures who died hundreds of years before their time, but it appears that there is at least the ability to recognize others.
But what about interpersonal relationships? Will we be able to spend time with those we knew on Earth, all while worshiping God forever? 1 Thessalonians 2:19 says:
Legg also goes into a deep analysis of the consistent use of the phrase "gathered together", which we see in 1 Thess 4:17 and 2 Thess 2:1. The point he makes is that in saying "gathered together", the Bible says that we will be participating with our friends and family in worship.
Then the question becomes on what level will our relationships be? We already know from above that we will
Hebrews 8:5 says:
Because the earth is but a shadow of heaven, that is the reason people are not given in marriage in heaven. Legg says explicitly:
The relationships we develop on this earth will not go away when we get to heaven, but they will be deepened with each other, and new friendships can be formed with those that died hundreds or thousands of years before us.
Further evidence is given in the wording used when the patriarchs of ancient Israel died:
That article closes with an excellent point:
Paul makes a cryptic reference in 1 Corinthians 13 to what heaven will be like. He writes:
Simply put, he says that the relationships we will have in heaven will be far deeper than what we have now. As such, assuming that our relatives are in heaven with us, we will be able to know them better than we ever did in life.
I can't quite say about relations, but I do know that there is no marriage in Heaven (Mark 12:18-27). As for "keeping relations" or "starting over", I'm not sure what you mean. I believe that we will know our saved relatives though, but I can't back it up with scripture.