Holtznagel, who met Dawson on Australia’s Next Top Model in 2011, said she still struggles with grief.
“I had a cry last night,” she said in an interview with The Daily Telegraph.
“I think about her all the time. I miss her ... I am not angry any more, I just wish she was here.”
Holtznagel admits she wears Dawson’s shoes so she can feel closer to her.
“Some people might find that weird, having so many constant reminders, but I am past that point now,” she says.
Dawson killed herself three years ago after a long battle with depression. She also struggled to cope with online bullying after receiving abuse on Twitter.