I think the best thing for you to do is to walk away from some of these conversations.
It is unlikely that they will lead anywhere good.

As long as he is involved with someone else you can not be providing for any of his needs.

The affair will die when it is not so hot and the light of day is shined on it.

Did you see the links in Wonka's post?
Read about Train.

Me-70, D37,S36