MISSING Jack O'Sullivan's mum has told BBC Crimewatch of her "rollercoaster from hell" since he went missing.
Catherine O'Sullivan, 52, said ''nothing makes sense - nobody can tell me where he is or what’s happened''.
She also said "until somebody can tell me where Jack is, I have to somehow believe that he’s somewhere'' and "I’m not going to stop looking until I get an answer''.
Catherine appeared on BBC's Crimewatch today (October 7) describing her life since Jack went missing on March 2.
She said: "It’s a very strange world without him being at home, because we’re so used to being a very close family.
"Nothing makes sense. Nobody can tell me where he is or what’s happened. It’s a rollercoaster from hell."
She described Jack, 23, as a "kind, caring and family oriented young man," and says his disappearance is her "worst nightmare."
"Nobody would have a bad word to say about Jack," Catherine said.
"He’s a kind, caring young man – very family oriented. He’s quite quiet, but quite cheeky at home.
"He’s one to put people before himself, and he’s just a really good egg.
"The last time I saw Jack is very vivid in my mind, because he drove me to meet our friends and he was full of laughter, full of banter.
"That moment is fixed in my mind because he had a big smile on his face.
"I can’t let him down and I have to get an answer. It’s like the worst nightmare.
"Even though time has moved forward, I’m still on March 2. My life is still in complete disbelief and shock."
Catherine described how her family refuse to give up hope of finding Jack.
"Until somebody can tell me where Jack is, I have to somehow believe that he’s somewhere," said Catherine.
"I’m not going to stop looking until I get an answer.
"I don’t know where Jack is, but I can’t accept that I’m not going to see him.
''I just have to stick with that belief until somebody can tell me anything else. That’s where I am.
''I have to live with that tiny little bit of hope that it’s all going to be okay."
Also appearing on the show was Detective Inspector Jason Chidgey from Avon & Somerset Police.
He shared details of Jack's clothing that night, as well as reminders of the night to potentially jog the memory of viewers.
"On the bottom half, he was wearing blue chinos, with quite distinct brown Ralph Lauren shoes with really distinctive white soles," Detective Inspector Chidgey told the BBC.
"On the top, he was wearing a cream woollen jumper with his green khaki Barbour jacket.
"It was a particularly cold night after a mild week in Bristol, and it snowed. It would have been very cold, it would have been icy, and there was snow on the ground.
"Bristol City played Cardiff the afternoon that Jack was last seen.
"We’re hoping that those two events might trigger something for someone to come forward.
"The family have showed tremendous resilience in the seven months that Jack’s been missing.
"We’ve utilised an awful lot of units inside of our organisation to try and give them the answers that they so desperately need.
Since Jack’s disappearance, more than 20 different Avon and Somerset teams and departments have been involved in the investigation.
They have additionally been supported by other agencies and emergency services, such as the fire and ambulance service, National Police Air Service (NPAS), RNLI, HM Coastguard and independent search and digital experts.