"The children of this age marry and remarry; but those who are deemed worthy to attain to the coming age and to the resurrection of the dead neither marry nor are given in marriage. They can no longer die, for they are like angels; and they are the children of God because they are the ones who will rise. That the dead will rise even Moses made known in the passage about the bush, when he called 'Lord' the God of Abraham, the God of Isaac, and the God of Jacob; and he is not God of the dead, but of the living, for to him all are alive." -Luke 20:34-38
It is natural to try and understand Heaven by comparing it to life here, but there is no comparison. When we live in the presence of God, our only desire will be to look upon Him and adore Him with an intensity that was impossible from our earthly bodies. Our capacity to love the Lord will be heightened, and through our union with Him, so will our love for each other, but in a way we cannot imagine. We will love each other as Christ loves us.