The 44-year-old construction worker also claimed Louis' half-sister Georgia is "his biggest fan" and would love the chance to meet her idol.
He added: "It's up to him. I want him to know I think he's fantastic - and that Georgia is his biggest fan ... She's a teenage girl and her brother is in her favourite band.
"Of course she wants to tell the world and wants to be a part of his life ... She idolises him. All she wants is to be a proper sister to him."
He took 14-year-old Georgia to see Louis, 21, and his Little Things band mates at a recent Nottingham show, but weren't able to reconnect.
Troy revealed: "It was a shame we couldn't see Louis and tell him how brilliant he was. But I know he and the lads are really busy.
"I haven't been there for most of his life so I understand I'm not one of his main priorities.
"He knows we were in the crowd and now I want to tell him what it meant to me to see him up there. I cried buckets."
- BANG! Showbiz