If you are reading this through grief, please know: this is one of the deepest questions a human heart can ask, and the Christian answer is yes.
What Scripture says
Paul comforts the Thessalonians with the promise that they will be reunited with believers who have died: "We who are still alive will be caught up together with them" (1 Thess. 4:17). The whole point of the passage is reunion.
The disciples recognize the risen Jesus (Luke 24:31; John 20:16). The Transfiguration shows Moses and Elijah identifiable across centuries (Matt. 17). Abraham, Isaac, and Jacob are still themselves when Jesus speaks of them (Matt. 22:32). Personal identity survives death.
What about marriage?
Jesus says there is no marrying or being given in marriage in the resurrection (Matt. 22:30). This puzzles people — does that mean love ends? No. It means the partial joy of human marriage is taken up into the greater joy of universal communion with Christ and with all the saints. Nothing good is lost; everything is enlarged.
C.S. Lewis: in heaven, every relationship will be more loving, not less, because every love will finally be free of fear, possessiveness, and the shadow of loss.
The Orthodox lens
The Communion of Saints is not a future hope only — it is present reality. We pray for our beloved dead now; we ask the saints to pray for us now. The veil between living and dead is thinner than we think. The Liturgy itself unites earth and heaven: "With these blessed Powers, O Master who lovest mankind, we also cry aloud and say: Holy art Thou, and all-holy…"
At every Liturgy, the departed are commemorated by name. The Church does not forget them. Neither does Christ.
A pastoral word
If you have buried someone you love, the Christian hope is not vague comfort. The body that held you will hold you again. The voice that said your name will say it again. Christ has the keys of death (Rev. 1:18). Death does not get the last word — he does.
Until then, pray for them. Light a candle. Remember their face. Love does not end at a grave.