Does Eros have any brothers or sisters?

He had a brother, Anteros, born of Aphrodite and Ares so that the lonely Eros could have a playmate.

Anteros, with Eros, was one of a host of winged love gods called Erotes, who were ever-youthful, winged gods of love.

Hesiod places Eros (love) and Himeros (desire) at being present at the time of Aphrodite's emergence from the sea. They were either born with her or of her. Pothos (passion) was a later addition to the myth. The myth around Anteros is unconnected to the origin myth of the Erotes, as far as I can tell.