Points taken, re triads and all - that was badly stated on my part. Thanks for the clarification.
As for the NRE, yeah, it's partially that. But really, it's the happiness toward the couple I'm not in, the compersion, that really stands out to me.
The longer history is that my wife really did NOT like my LDR for many years, and only recently and slowly have we found peace about that. For her to fall in love, herself, and for them to find each to each other as they have, is a natural growth that none of us were expecting. It just feels easy, normal, and right to be doing this.
Thanks for the kind words, all!