What did cupid look like?

A cute baby with a bow and arrow

Originally, as Eros, he was presented as a slender young man, but also as the cherubic child we know. One myth explains that another son of Aphrodite, Anteros (passion and requited love) was the cause. Whenever Eros and Anteros were together, Eros grew into a young man, but when they parted, he reverted into a child again.