Okay, I hope I'm not just ruining this more, but here are some facts that boil it down and might explain why we're heading this way.

The long term feelings of love come from the hormone oxytocin. It's the bonding hormone if you like. It builds up through physical and eye contact and it's what makes it harder when you lose a beloved pet who has been with you for a long time, as opposed to a short time.

Now if you look at our lifestyle where partners work all day, the children need to be taken here and there and we spend more and more time in a virtual world online, we've become like ships passing in the night. We're losing that connecting time and the hormones are fading. This is why I make sure to schedule in family time.