The father of murdered bride Anni Dewani said he has "not been able to sleep at night" since his daughter was killed on a honeymoon in South Africa.
Vinod Hindocha told ITV News: "It's been very difficult for us to go ahead with our lives."
"Nights are difficult. Days can go but we can't sleep at night, even today. Every single day, between three and four, we get up and just wonder why.
"Both of us just ask each other why. And every single day it's the same procedure. I hope that we get these answers and at least we can go ahead with our lives. I know it will be very difficult, but we have to try. But before that we need the answers."
Anni Dewani's father has said that the past three years waiting for Shrien to be extradited has been "torture" for the family.
In an exclusive for British television, Vinod Hindocha told ITV News: "Believe me. Every day has been a torture for us, thinking of Anni, and thinking of why did she die?
"We have had very, very difficult times. We've been fighting for this. And now we are there."
He also talked about the moment he knew there was a problem, saying that at the time he "didn't know whether she was dead or not".
Mr Hindocha added: "I found out in Amsterdam, at the airport. That was a nightmare believe me."
The father of murdered bride Anni Dewani has said he and his family are "happy" that Shrien Dewani has been extradited to South Africa and will "have to answer questions".
Vinod Hindocha has told ITV News - in a British television exclusive - that he had mixed feelings about the English justice system, adding that he felt the trial should have begun three years ago.
He said: "We are quite happy with the judgement and the court decisions from England. Now we hope to get the answers we are looking for over the past three and a half years.
"I knew he would have to go one day or the other [to face trial in South Africa]. He should have been there three years back. But the English justice system - that's the way it is.
"At least he is there now, and he will have to answer the questions."
The mental health of Shrien Dewani, wanted in South Africa over the honeymoon murder of his wife, has improved "significantly", a court heard.
The 33-year-old business man is being treated in hospital in Bristol for depression and post-traumatic stress disorder(PTSD). His 28-year-old wife Anni was shot when a taxi the couple were travelling in was hijacked in the Gugulethu township on the outskirts of Cape Town in November 2010.
Prosecutor Ben Watson told Westminster Magistrates' Court his mental health had "improved, and improved significantly" but he remains moderately depressed and is still suffering from (PTSD).
A further hearing is planned on May 15, and extradition proceedings are expected to resume in July.
Xolile Mngeni, 25, who was convicted of firing the shot that killed Anni Dewani on her honeymoon, has been handed a life sentence by a judge in South Africa.
Xolile Mngeni, who had surgery in June 2011 to remove a brain tumour, has suffered seizures and black outs and has memory problems, his lawyer said. His poor health has slowed his trial and he appeared skinnier than he had at previous hearings.
In his ruling, Judge Henney dismissed claims by Mngeni's lawyer that his client had been set up for the killing.
Zola Tongo, the taxi driver that police say Anni's husband Shrien asked to plot the killing, earlier pleaded guilty to charges over the death and received an 18-year prison sentence. Mziwamadoda Qwabe was jailed in August for 25 years after admitting murder.
Both Tongo and Qwabe have said Mr Dewani wanted it to look like he was not involved his wife's murder.
In a statement provided as part of his plea deal, Qwabe said that after he and Mngeni staged the fake hijacking, he drove the car as Mngeni kept a pistol pointed at Mrs Dewani in the back seat and then pulled the trigger, the fatal shot going through her neck.
Panicked, Qwabe said he stopped the car and got out, helping Mngeni find the spent bullet casing. He threw the casing into a sewer as they ran away into the night.
Prosecutors said Xolile Mngeni was hired by Mrs Dewani's British husband Shrien Dewani to carry out the killing, which was made to look like a car hijacking in Cape Town's impoverished Gugulethu township during the couple's honeymoon.
Following her death three men have been convicted. Anni's husband Shrien Dewani is fighting extradition to South Africa and continues to deny he orchestrated the killing. The convictions to date are:
December 2010: Taxi driver Zola Tongo is jailed for 18 years after making a plea agreement with prosecutors.
August 2012: Mziwamadoda Qwabe is jailed for 25 years after admitting murder.
November 2012: Xolile Mngeni is found guilty of killing Mrs Dewani.
A South African man has been found guilty of shooting honeymoon tourist Anni Dewani in 2010.
Prosecutors said Xolile Mngeni was hired by Mrs Dewani's British husband Shrien Dewani to carry out the killing, which was made to look like a car hijacking in Cape Town's impoverished Gugulethu township.
In August Mngeni's accomplice Mziwamadoda Qwabe pleaded guilty to charges over the murder.
Mr Dewani is fighting extradition to South Africa and continues to deny he orchestrated the killing.
Judge Robert Henney ruled Mngeni was guilty of killing 28-year-old Mrs Dewani.
A judge has found Xolile Mngeni guilty of the murder of honeymooner Anni Dewani in South Africa in 2010.
The family of murdered British honeymooner Anni Dewani has expressed happiness over today's conviction.
However, they said the full truth of "what really happened" to Mrs Dewani would not be known until her husband, Shrien Dewani, travels to South Africa to face trial.