I have a bunch of female friends. At one time, my kids thought that one of them was a girl friend. Not even close.

Some opposite sex friendships can put a lot of strain on an M and I have a lot of mixed feelings about them. This might be an interesting topic for another thread. Nonetheless Jon, I don't think your w is interested in this guy for a physical relationship. Possibly this guy is interested in your w and she likes the attention and that is about it.

Me-45
W-44
T-7 years
M-3 years (4th anniversary July 13, but we're separated)
Kids from previous relationships (s14 d16 mine, s23, s24 hers)