There's two kinds of love: family love and personal love. Family love is a campfire, built to warm and provide light to all those who sit around it. Personal love is when you reach in and pick out a flaming torch and use it to guide yourself in the dark when you leave the campfire.
The family love is seen in the web that connects every friend and stranger. That's the love we can define. Personal love, on the other hand, it's what magnetizes one nose to another, and we can't explain it. We can explain love in its altruistic form, the animal form, that survival pillow that gives purpose to doing well by one's neighbor, but there is absolutely not a damn thing similar to a dark room with two bodies in it who are made of the same light.