It wasn't a prolonged kiss on the lips, so its possible there was no more intent to it and perhaps your just thinking to much into it. But in the future, just turn your head and let him kiss your cheek. My friends wife always kisses me that way and its purely for friendship.
To answer your last line, I think it was a comfort kiss AND more. It sounds like he got caught up in a moment of emotion. In that moment of emotion, he got a little carried away and did something that he might have wanted to do for some time.
Since nothing has materialized from this, it is possible that he was embarrassed by going too far, and might want to forget that it happened. That being said, I think you need to get your house in order and be ready for a possible "next time". 1.
You said your relationship is coming to an end.... Does that mean you are divorcing soon? Is it past the point of reconciliation? 2.
If it is, what is it that you want from this friend? Are you looking for him to leave his wife? Are you prepared to be the "other woman"?
Would you put your friend in that position? If I was in your shoes, I would focus on myself. If your relationship is coming to an end, then you have enough on your plate without entering into this drama.
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.