"It hurt my family, above all those close to me. That's all I want to say," he told the French sports programme "Orange Sport" on Saturday night, after his club's 3-1 win over Bochum.
The soccer star, a married man with two children, has been at the centre of scandal ever since a human trafficking case broke last month in which Ribery and his teammate on the French national team, Sidney Govou, were called as witnesses.
Ribery admitted to having sex with the prostitute, Zahia Dehar, but said he did not know she was underage.
Now a judge will decide whether or not to bring charges against him. If charged and found guilty, Ribery could face three years in prison and a €45,000 fine.
He might also lose his place on the national team. France's junior sports minister, Rama Yade, said last week that if an official investigation into the matter was begun, he would no longer wear the national team jersey.
"The jersey of the French national team is sacred," she said.
While Ribery's career could be in trouble, call girl Dehar's could be taking off. According to the Swiss tabloid Blick, a porn director is interested in making a film over the sexual lives of football players and he wants Dehar for the starring role.