Karl David William Baudoeuf used the fake name "Pete Bundy" on Facebook and his victim thought he was "Mr Wonderful" until he repeatedly bashed and raped her after luring her with music festival tickets.
He was sentenced in the West Australian District Court on Tuesday to seven years and four months in prison.
Baudoeuf, 33, had befriended the 28-year-old woman on Facebook in 2014, but only met her in December 2016 when he promised her tickets to the Southbound Festival in Busselton.
He drove her to his home where they took drugs and had consensual sex.
"The victim said that you seemed like Mr Wonderful at that time who wouldn't say a nasty word," Judge Vicki Stewart said.
But the next day, the victim witnessed Baudoeuf assault his ex-girlfriend.
The victim later confronted Baudoeuf for lying about the festival tickets and his real name, prompting him to headbutt the woman and hold her captive for three days during which he repeatedly attacked her.
She finally managed to run away to a neighbour's house while Baudoeuf slept.
The woman had suffered several injuries including a black eye, broken nose and bruising on her temple.
Baudoeuf stood trial and was found guilty of six offences including sexual penetration without consent, deprivation of liberty and assault occasioning bodily harm.
But he continued to deny the crimes happened, which Judge Stewart said showed he lacked remorse and a willingness to accept responsibility for his behaviour.
"You used sexual violence and force as a means of exerting control and power over the victim," she said.
"Your offending was persistent. The victim was vulnerable. She did not know where she was. She feared for her safety."
The court heard Baudoeuf had a history of drug use, especially methylamphetamine, and mental health problems.
Judge Stewart urged the father of five to continue with his treatment programs in prison and stop using drugs.
Baudoeuf, who appeared in court via video link from prison, repeatedly buried his face in his hands during proceedings and cried when his sentence was handed down.
He must spend at least five years and four months behind bars before he can be eligible for parole.