Thoughts about conversation topic

Somehow the topic of cheating came up on the phone the other night with my new bf, and he said that he would feel guilty if he ever cheated and probably never confess. I didn’t say anything but kept that in the back of my mind as a potential red flag. Like thanks for the heads up? How would you feel in this situation? Early on we talked about past relationships and how neither of us have ever cheated and how I have been cheated on before, and how much of a garbage person one is to do so, but now it’s making me double guess by what he stated, like was he without realizing admitting or giving me a warning?? I would never cheat on someone, if I was that miserable I’d leave that person and then get involved with someone else.