@Anonj321,
Yes most of us on here have friends of the opposite sex without any sort of sexual relationship -- he is untrustworthy - he has shown himself to be that way. Personally I would not want a friend that is untrustworthy. But that is my own personal values.
Again I think you are being naïve he wants to try to get you in the sack again. I am a bit older than you and have experienced more in life... the guy is a sleaze -- just put pen to paper and list what has happened in his life....
negatives -
Divorced...(not that someone who is divorced is necessarily a bad choice as everyone makes mistakes and many learn from them, but when you add everything else with it doesn't sound promising).
Newly married --- you said he was married only a few months when he cheated on his new wife? What the f???
Lies/misleads young woman to have sex
Positives -
Nice guy to talk to and have lunch with
--- I wonder whether the positives outweigh the negatives?