Harper visited the scene of Lane's death Tuesday. It's a grassy curb on a suburban street where flowers have been placed with messages of regret and condolence.
"I'm going to miss him forever. But I'm really glad that I got the four years with him," Harper told reporters. She and her family will travel to Melbourne for Lane's funeral on a date still to be set.
Lane's distraught father, Peter, told the media: "He's left his mark as we know, and you know there's not going to be any good come out of this, because it was just so senseless."
A former student and classmate at East Central University where Lane was studying described him as "a charming guy, genuinely good person, with great character and had a love for life."
"As cliched as it sounds, Chris was the kind of guy you want your sons to grow up to be and that you want your daughters to marry. It just breaks my heart knowing how much more he could have brought to this world as a husband, father, son, brother and friend," Sam Malchar said.
The shooting took place one day before the three suspects were due to return to school.
Security was tightened around the Duncan School District after anonymous phone threats were made to Duncan High School.
Schools opened as normal Wednesday, but students were not allowed to leave for lunch and parents were being told they could keep their children at home if they wished.