The former world player of the year voiced his delight after Atletico Mineiro overcame Newell's Old Boys on penalties to reach the final of the competition.
Goalkeeper Victor was the hero for the Rooster, saving the Argentines' fifth penalty to clinch victory after Ronaldinho had put the Brazilians ahead in the shootout.
“It's an amazing feeling. We are all aware of the fact that we can make history," the 33-year-old said. "This is the first time in the club's history that we have made the final of the competition. I can’t explain how happy I am.
"It’s what motivates me to play – to keep winning titles that I haven't yet won. I feel like a child."
The former Barcelona star set up Bernard for the opener after just three minutes before substitute Guilherme came off the bench to grab a dramatic late equalizer with six minutes remaining to take the game to penalties.
With the penalty shootout locked at 2-2, Ronaldinho stepped up to take Atletico's fifth penalty and calmly converted before Victor saved Maxi Rodriguez’s penalty to book his side’s place in the final against Olimpia.
“We are going to be motivated and prepared for the final,” added Ronaldinho. “We want to make history."
Newell’s coach Gerardo Martino expressed his disappointment after the game and confirmed that though he will be leaving the Argentine champion, he may not be heading for Brazil.
"I’m certain I am leaving Newell's,” he said. “But I will not coach Santos."