Juan Ramon Guerrero and Christopher Leinonen (also known as Drew) had been dating for two years. They lived together and planned to get married.
They are among the 50 people killed in Orlando on Sunday in the worst mass shooting in American history.
Juan’s family were preparing to celebrate his 23rd birthday in a number of days, but are now organising a funeral. They say they will farewell their son alongside his 32-year-old “soul mate” in a joint funeral.
Juan's father Juan Ramon Guerrero told Time, “I think my son wanted to do that. That’s why. I don’t care what the people think. I don’t care.”
His sister Aryam added, “If it’s not a funeral, they were going to have a wedding together... They were honestly so in love. They were soul mates.
"You can tell by how they looked at each other,” she continued. “It’s a little comforting that they died together.”
Juan senior also told Time that Christopher's mother, Christine Leinonen, supports the idea of holding a joint funeral for the couple.
The pair were at Pulse nightclub with two friends who survived the attack. They had gone to the bathroom without Juan and Christopher when they heard the first gun shots ring out.
Juan was eventually taken from the venue by ambulance but later died of his injuries in hospital. He was a student at the University of Central Florida and was hoping to become a financial adviser. His partner Christopher was a licensed mental health therapist.