An "open" relationship with someone else means he is desiring a FWB sexual partner and not actually interested in fostering a deeper relationship. What's to ruin? He's got someone else.. he's just looking for more sex partners.
Apparently not desperately horny because he's got more irons in the fire than you, dear. However, if you continue to make yourself available without stalking him.. it seems a given he'll get around to poking you sooner or later.
Something tells me that his partner is not aware that they are in an open relationship.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.