More than a Feeling
It is this sort of all encompassing law the questioner is asking about, wanting to know what matters most. Jesus replies,
You shall love the Lord your God with all your heart, and with all your soul, and with all your mind. This is the greatest and first commandment. And a second is like it: You shall love your neighbor as yourself. On these two commandments hang all the law and the prophets.This is the Cliff Notes version of the whole Bible. Jesus sums up all of the teachings of scripture saying that we fulfill God's will if we love God and love our neighbor as ourself. We need each other so much that the first thing God pronounced "not good" was loneliness (It is not good for man to be alone).
The love to which we are called is not merely a feeling. Love is an action and we can show loving actions to people we don't even like. Psychologist tell us though that this only works for so long as we get increasingly likely to actually like someone when we do nice things for that person (as long as they are not mean in return for the kindness). In the process, we are drawn closer to God.
Abba Dorotheos used the illustration of mankind being like a wheel. God is the hub, and people are the spokes. The closer we get to God, the closer we get to one another. But put another way, the closer we get to other people, the closer that brings us to God. Finally, there is an anonymous poem that puts it all together:
and the soul I could not see.
I sought my God and God eluded me—
I sought my neighbor and found all three.