The 61-year-old is being investigated by German Revenue Administration for tax evasion that is centred on a Swiss bank account.
"These days, I feel like I am catapulted onto the fringes of society, I am no longer part of it," he told Die Zeit. "Needless to say, I blame myself massively. I made a huge mistake, but I am not a bad person. It is a situation I am hardly able to take.
"If I get the impression my presence damages the club, I will take the consequences. But in no circumstances will I step down before the Champions League final."
Bayern will take on Borussia Dortmund in the final of the Champions League at London's Wembley Stadium later this month.