Do I tell him all I know?

[Sotto]

I agree. Early on in my sitch, I read about 'stable triangles' where you have LBS, WAS and AP - each a point on the triangle.

WAS gets some needs met by the AP and some by the LBS. AP and LBS both tolerate the situation in the hope that things will change - WAS will choose one of them or the other. But it suits WAS to have both, and so he doesn't choose. He just carries on.

But, you don't have to be a point on that triangle unless you choose to be. You can't control what H may do, but you can control you. If you withdraw, the stability of that triangle is undermined, and pressure is put on the A relationship. Plus you get some space and time to regroup and focus on you...