Krsna means God. We are eternal servant of God. So our duty is to help the master to enjoy. Just like here is Krsna. Srimati Radharani, She is the topmost servitor of Krsna. So Her business is to keep pleased always Krsna. That is the symbolic representation. Radha. Radha means anaya aradhyate. She is serving, the best service. Anaya aradhyate. Therefore Krsna is very much fond of Radharani, because She gives the best service to Krsna, in so many ways. She has got sixty-four qualifications.
Ref. VedaBase => Srimad-Bhagavatam 3.25.7 — Bombay, November 7, 1974