Tia's final message: Heartbroken boyfriend of 18-year-old run down and killed by an out-of-control bus reveals what she told him moments before she died

The heartbroken boyfriend of a teenager killed by a bus that mounted a footpath as she left a beauty salon appointment has revealed the last message she sent him.

Tia Cameron, 18, had just finished getting her eyelashes done in the Brisbane CBD at about 5pm on March 8 when the bus allegedly veered off the road and fatally pinned her against the wall of a building.

Three months on, her shattered boyfriend Hayden McKinlay has built up the courage to finally speak about her death. 

The high school sweethearts were planning their future together when the tragedy struck.

He said he received a video message from Ms Cameron showing off her new lashes  just before she left the salon and walked outside.

'Our last phone call was 'love you and I'll see you soon', he said

Mr McKinlay said even months on he is having trouble believing that the woman he had been dating since a young teenager was not going suddenly reappear.

'We had so much planned together, to travel, to buy our first home, to have children. It was all there until this happened,' Mr McKinlay he told 9NEWS.

'I still think I'm still going to hear from her, I'm still going to see her, the truth is it's not going to happen.'  

After extensive investigations by the Forensic Crash Unit, 70-year-old Linday Selby was charged with one count of careless driving causing death on Monday.

Four passengers and the driver were taken to hospital after sustaining minor injuries.

The bus driver is expected to appear at Brisbane Magistrates Court on June 26.

'He hasn't reached out to any of us to give his apology or anything which is really upsetting,' Mr McKinlay said.

When asked why he hadn't reached out, Selby said: 'Listen mate, this is a very difficult situation for me. There's more than one victim and that's all I got to say on the matter'. 

Ms Cameron was reportedly facing the wall of a building at Anzac Square when she was hit from behind and pinned against the wall of the structure.

She tragically died at the scene, despite the best efforts of emergency responders. 

The incident caused chaos near the scene at the intersection of Edward and Adelaide streets, not far from Brisbane's Central railway station, with pedestrians running from the crash site and peak hour traffic diverted. 

Witnesses described hearing the bus hit a light pole before crashing onto the footpath and seeing 'bricks flying', according to the Courier Mail.

At the time of the incident, District Duty Officer Senior-Sergeant Steve Watterson described the scene as 'horrendous'.

Ms Cameron's family also mourned the loss of the vivacious teenager that they said been 'stolen from us'.

Her mother, Jade Te Awhitu, said the loss was shattering.

'She was only 18 and had her whole life ahead of her,' she said. 

'She was beautiful, outgoing and unique, really unique. She loved the beach, the Gold Coast, fashion and looking after her partner's little puppies and dogs. She was really close with all of her family.'  

Ms Cameron's devastated aunty Karma Te Awhitu said: 'We just feel like she's been stolen from us.'

'She messaged me at 4pm saying she was getting her lashes done and asking if I wanted to catch up for a quick cocktail before she headed home,' she said.

'When I hadn't heard from her and her partner hadn't heard from her, we realised she was missing and started looking for her. 

'I was ringing the hospital and Hayden was calling the police and even went to the police station to file a missing-person report, because it was just so out of character for her.'  

At Ms Cameron's emotional funeral service, the aunt said she would miss her niece's laugh, 'questionable' sense of humour and 'dorkiness'.

'You had plans to study and further your education. You had plans to travel. You always spoke of being a mum, even from a very young age and I knew that one day you would make an incredible mother.'

Mr Mckinlay's mother, Christine Melrose, has set up a GoFundMe page for Ms Cameron's family.

Ms Cameron attended Ferny Grove State High but left school at 16 to work in the beauty industry.

She got an admin job at the prestigious Brisbane Club in the city.

Ms Te Awhitu said although her daughter loved that job, her interest was in pursuing beauty and cosmetics.