You know how cunningly mankind is planned:
We have one loving and one hating hand.
The loving's made to hold each other like,
While with the hating other hand we strike.
Lovers may be and indeed generally are enemies, but they never can be friends, because there must always be a spice of jealousy and a something of Self in all their speculations.
Interdependence is a fundamental law of nature. Even tiny insects survive by mutual cooperation based on innate recognition of their interconnectedness. It is because our own human existence is so dependent on the help of others that our need for love lies at the very foundation of our existence. Therefore we need a genuine sense of responsibility and a sincere concern for the welfare of others.
I was so sentimental about you I'd break any one's heart for you. My, I was a damned fool. I broke my own heart, too. It's broken and gone. Everything I believe in and everything I cared about I left for you because you were so wonderful and you loved me so much that love was all that mattered. Love was the greatest thing, wasn't it?
Whoever makes love grow boundless, and sets his mind for seeing the end of birth, his fetters are worn thin. If he loves even a single being, Good will follow. But the Noble One with compassionate heart for all mankind, generates abounding good.