You have to remember that you're with him now and your neighbor is a thing of the past. They broke up for a reason.
Showing signs of jealousy won't make anything better, in fact, it will make things worse.
Here, read my hub for more info, if you follow my guide correctly, your jealousy should go away or at least lower drastically.
I'd find out politely what happened that time. Don't go grudgingly, or rudely. Just casually speak 2 her & don't start out w/ that.
Just start w/ casual conversation & blend right in2 that. Don't play the blame game if you really want 2 find things out.
U never know if they may not be just friends & nothing more. IF however, he deceived her, then blame him 4 lying; (many men DO deceive). Just be on friendly terms w/ the woman & don't get suspicious yet; it may very well be innocent 4 all we know.
I used 2 have upstairs neighbors yrs ago, & I was a family friend. I was able 2 be trusted alone w/ the man & their kids, because I had no interest in anything more than friends & that's it. It's nice 2 B able 2 have built trust in relationships by proving trustworthiness.
Staying pure IS very advantagious.
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.