Raven might be friends with Cyborg and sometimes Raven gets annoyed by him, there was one Cybrae Episode Love Struck to pay respect to Cyborg x Raven fans altrough BBRae is already Canon

Times of Friendship

Thanksgiving: Raven prevents her dad to eat Cyborg so she goes on a battle with her own father

Hints of attraction

Love Struck: After the Break up with Beast Boy they instantly fall in love with each other.