Question: why rukmini is not worshipped?
Answer: We do not worship Meera with Krishna because she is jiva-tattva, a human being like us. Rukmini Devi is sometimes worshipped with dwarkadhish Krishna, as a king, and she is an expansion of Lakshmi Devi. However, the original form of Krishna is as Yashoda-nandana in Vrindavan.