I'm with AS. This is how things start. I'd make it clear to him it's a friends only thing. But, I did have a few males try to start up a friendship, and I simply said "No matter how my H is conducting himself, I still consider myself married. I don't believe in opposite sex friendships while married."

It is my personal belief. Doesn't have to be anyone else's.

M: 9 yrs
T: 13 yrs
H:34 Me:35, S4, D2, S 7 months
Dday 11/12-PA & multiple PAs
Dbing 12/12
S 1/13
7/13 H moved back in basement.
8/13 #3 born
10/13 still cheating
10/13 He moves across country, I file for D