This god deserves more respect than the cherubic image suggests. Amor or "love" is another Latin name for the Greek god Eros. In Greek mythology, Eros is one of the primordial forces, like Chaos. In Hesiod, Chaos came first and then Earth and Eros came into being.
Apollo, god of intellectual pursuits, was foolish enough to contend with the seemingly harmless Eros, but Apollo had misjudged his young cousin*. The arrows Eros/Cupid/Amor carried were of two sorts, ones that caused mortals to fall in love and another made of iron that caused people to be repulsed. Thus, when Apollo got on the love god's bad side, he was hit with a golden love arrow while the object of his affection was hit with an iron one. The love and hate between the two is told in the story of Daphne, by Ovid in his Metamorphoses. Daphne was a nymph who was transformed into the laurel tree by her own father to prevent Apollo from ravishing her.
* The parents of Cupid/Eros/Amor are variously described as
- Aphrodite and Ares
- Aphrodite and Hermes
- Iris and Zephyrus