Trust me, if he does spend time with any of the friends he had before BD, they are just as confused as you about why he'd want to date someone that young. Most likely he's made a whole new set of young friends who are happy to have someone who can buy alcohol for them.

And these new friends are probably not working at real jobs, going to college to improve their future, or doing anything future oriented. It's all about having fun now which appeals to him.

A normal 18yo would not be interested in dating a grown man who has a wife and kids. Even if he was divorced, they would know they're not ready to be a stepmom to an instant family.

None of them are thinking about anything but having fun in the moment. And that can never last forever. Eventually reality will set in.

M36 XH34
M-5 T7
4/11 H confused
5/11 ILYB
6/11 OW discovered
7/11 I move out, OW over
5/12-OW2,done->new EA, but H wont file
9/12 H "best bf ever" to EA/OW3
3/13 H/OW break up
H files 4/13
D 6/18/13