Rohan Khurana had befriended the Pune-based woman, who worked in Ghaziabad, two years ago on Facebook and later started talking on phone and met many times at various places.
The woman has alleged that Khurana had sexually abused her many times in Delhi and Noida, promising to marry her.
She said they were in a 'live-in' relationship for some time.
She told the police that Khurana raped her on Friday at a hotel in Sector 44 in Noida.
Khurana has admitted that they were friends but denied the rape allegations.
"Accused Rohan has been arrested. Investigation is going on," a police official said.
Police said the woman has been sent for a medical examination.
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