He watched as close friend and AAU teammate John Wall developed from a kid with potential to the No. 1 pick in the NBA Draft.
Now Bello, a 6-foot-4, 170-pound wing, is trying to make similar strides and develop as a player.
"I was just watching the whole thing," Bello told Scout.com. "Maybe that can be me one day. I just saw somebody that went through the whole process since he was a freshman."
"John's like a coach to me," he added. "He's like my big brother. Just watching him just motivates me more."
It's clear that Bello has been motivated. His extra time in the gym has paid off. Always known for his athleticism, Bello has shown a better handle and an improved mid-range game this spring.
" "I've been working on it every morning at the gym," he said of his skill set. "Everybody knows I'm an athlete and most athletes don't' get that much respect. I'm just trying to show everybody that my skill set is getting better."
"I'm basically working on my pull-up because when I drive everybody closes in," he added. "I'm working on my pull-up and tightening up my handle."
After suffering an injury during his junior season, Bello, a standout at High Point (N.C.) Westchester, felt he had something to prove when he hit the spring and summer circuit.
"I was injured during my high school season," Bello said. "After I had surgery I feel back a little bit and everybody was sleeping on me. I wanted to show everybody that I'm still here."
Although college coaches haven't been out this spring to see his improvements, they've certainly heard about Bello's improvement.
"It's going good," he said of his recruitment. "I actually just got a new offer from Louisville a few days ago."
"It's real early,' Bello said. "I haven't been on many visits yet. Brian [Clifton], Phil and my trainer are setting up my visits probably during the school year. I'll decide from there."
Bello, a four-star prospect, said there are three schools he's planning to visit.
"I think I have set up Baylor, Oklahoma State and Louisville as some potential visits," he said.
Bello and close friend, Quincy Miller, who just transferred to Westchester Academy, have a number of the same schools recruiting him. Any chance the two play in college together?
"We talk about it all the time, but at the same time we have to do what is best for me and him," Bello said. "We already know that we play well together, but we just have to do what is best for us to get to the next level."
Bello, who runs with D-One Sports, will be out in Las Vegas during July. He'll also participate in adidas Nations and Elite 24 in August.