Anjaneya Hanuman is the incarnation of Charusheela-sakhi, the sister and amsha of Sita Ji in the inner leela.
Since Hanuman Ji received Rama-Mantra directly from Bhagavati Sita, so he is direct disciple of Sita Ji, Therefore, Sita ji gives a lot of love to Hanuman ji. In fact, Hanuman is none but Charusheela Sakhi of Sita ji in divine Madhurya-abode, Saket-Loka, where Charusheela-Sakhi is Sarveshavari (supreme goddess), without her grace entry in Rasa-dance of Shri Rama is not possible.
http://www.iskcondesiretree.com/profiles/blogs/gopis-love-for-sri-krishna-1
https://www.youtube.com/results?search_query=Gopis+Love+For+Sri+Krishna+by+Hanuman+Prasad+Poddar
