Deepak (25), a mechanic, had one sided love affair with the girl. Both are the residents of Chandpur village, SP Ram Mohan Singh said.
Earlier, the girl had informed her parents about the advances by Deepak, which allegedly annoyed the accused.
Her parents lodged a complaint with the police after she went missing for two days. Her body was found last evening dumped under a heap of rics husk at Chandpur village.
Police have registered a case against Deepak who is absconding.